support DOTS 0.5 again for testing purposes

com.sebaslab.svelto.ecs/CHANGELOG.md

@@ -1,7 +1,7 @@
 # Svelto.ECS Changelog
 All notable changes to this project will be documented in this file. Changes are listed in random order of importance.
 
-## [3.4.1] - 03-2023
+## [3.4.2] - 03-2023
 
 * removed static caches used in performance critical paths as they were causing unexpected performance issues (the fetching of static data is slower than i imagined)
 * add Native prefix in front of the native memory utilities method names
@@ -20,6 +20,17 @@ All notable changes to this project will be documented in this file. Changes are
 * Added ValueContainer, a simple int, Tvalue dictionary based on sparse set. It has very specific use cases at the moment. Mainly to be used for the new ECS OOP Abstraction resoruce manager
 * Added IReactOnSubmissionStarted interface
 
+### SveltoOnDOTS changes
+
+* update to DOTS 1.0 (but still compatible with 0.51, although slower)
+* Deprecated the use of EntityCommandBuffer since was very slow
+* added faster batched DOTS operations, new DOTS creation patterns introduced (old one still compatible as long as EntityCommandBuffer was not used)
+* ISveltoOnDOTSSubmission interface exists only to allow the user to submit entities On DOTS explicitly, use this instead of 
+* SveltoOnDOTSHandleCreationEngine is no more, you want to use ISveltoOnDOTSStructuralEngine and its DOTSOperations instead wherever EntityManager was used before
+* ISveltoOnDOTSStructuralEngine is no more, you want to use ISveltoOnDOTSStructuralEngine and its DOTSOperations instead
+* in all the case above, if you were relying on Update you probably want to use OnPostSubmission instead
+* DOTSOperations new AddJobToComplete method will allow to register jobs from inside ISveltoOnDOTSStructuralEngines that will be completed at the end of the submission
+
 ## [3.3.2] - 04-06-2022
 
 * Internal refactoring to support future features. Currently it may translate to a small performance boost

com.sebaslab.svelto.ecs/Core/ComponentBuilder.CheckFields.cs

@@ -80,7 +80,7 @@ namespace Svelto.ECS
                             // Getters of ValueReference must be refs, which would cause a failure on the common check.
                             if (properties[j].CanRead == true && propertyType.IsByRef == false)
                             {
-                                ProcessError(MSG, entityComponentType, propertyType);
+                                ProcessError($"{MSG} Getters of ValueReference must be byref", entityComponentType, propertyType);
                             }
 
                             continue;

com.sebaslab.svelto.ecs/Core/EntityReference/EnginesRoot.LocatorMap.cs

@@ -174,8 +174,10 @@ namespace Svelto.ECS
             public bool TryGetEGID(EntityReference reference, out EGID egid)
             {
                 egid = default;
+#if DEBUG && !PROFILE_SVELTO                
                 if (reference == EntityReference.Invalid)
                     return false;
+#endif
                 // Make sure we are querying for the current version of the locator.
                 // Otherwise the locator is pointing to a removed entity.
                 ref var entityReferenceMapElement = ref _entityReferenceMap[reference.index];
@@ -190,13 +192,17 @@ namespace Svelto.ECS
 
             public EGID GetEGID(EntityReference reference)
             {
+#if DEBUG && !PROFILE_SVELTO                
                 if (reference == EntityReference.Invalid)
                     throw new ECSException("Invalid Reference");
+#endif
                 // Make sure we are querying for the current version of the locator.
                 // Otherwise the locator is pointing to a removed entity.
                 ref var entityReferenceMapElement = ref _entityReferenceMap[reference.index];
+#if DEBUG && !PROFILE_SVELTO                
                 if (entityReferenceMapElement.version != reference.version)
                     throw new ECSException("outdated Reference");
+#endif
 
                 return entityReferenceMapElement.egid;
             }

com.sebaslab.svelto.ecs/Extensions/Unity/DOTS/UECS/DOTSOperationsForSvelto.cs

@@ -1,7 +1,6 @@
 #if UNITY_ECS
 using System.Runtime.CompilerServices;
 using Svelto.DataStructures;
-using Svelto.DataStructures.Native;
 using Svelto.ECS.Internal;
 using Unity.Burst;
 using Unity.Collections;
@@ -35,18 +34,26 @@ namespace Svelto.ECS.SveltoOnDOTS
         public void SetSharedComponent<T>(Entity e, in T component)
                 where T : unmanaged, ISharedComponentData
         {
+#if UNITY_ECS_100
             _EManager.SetSharedComponent(e, component);
+#else            
+            _EManager.SetSharedComponentData(e, component);
+#endif
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        internal Entity CreateDOTSEntityFromSvelto(Entity prefabEntity, ExclusiveGroupStruct groupID, EntityReference reference)
+        public Entity CreateDOTSEntityOnSvelto(Entity prefabEntity, EGID egid)
         {
             Entity dotsEntity = _EManager.Instantiate(prefabEntity);
 
             //SharedComponentData can be used to group the DOTS ECS entities exactly like the Svelto ones
-            _EManager.AddSharedComponent(dotsEntity, new DOTSSveltoGroupID(groupID));
-            _EManager.AddComponent<DOTSSveltoReference>(dotsEntity);
-            _EManager.SetComponentData(dotsEntity, new DOTSSveltoReference(reference));
+#if UNITY_ECS_100
+            _EManager.AddSharedComponent(dotsEntity, new DOTSSveltoGroupID(egid.groupID));
+#else            
+            _EManager.AddSharedComponentData(dotsEntity, new DOTSSveltoGroupID(egid.groupID));
+#endif            
+            _EManager.AddComponent<DOTSSveltoEGID>(dotsEntity);
+            _EManager.SetComponentData(dotsEntity, new DOTSSveltoEGID(egid));
 
             return dotsEntity;
         }
@@ -59,14 +66,18 @@ namespace Svelto.ECS.SveltoOnDOTS
         /// <param name="egid"></param>
         /// <returns></returns>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        internal Entity CreateDOTSEntityFromSvelto(EntityArchetype archetype, ExclusiveGroupStruct groupID, EntityReference reference)
+        public Entity CreateDOTSEntityOnSvelto(EntityArchetype archetype, EGID egid)
         {
             Entity dotsEntity = _EManager.CreateEntity(archetype);
 
             //SharedComponentData can be used to group the DOTS ECS entities exactly like the Svelto ones
-            _EManager.AddSharedComponent(dotsEntity, new DOTSSveltoGroupID(groupID));
-            _EManager.AddComponent<DOTSSveltoReference>(dotsEntity);
-            _EManager.SetComponentData(dotsEntity, new DOTSSveltoReference(reference));
+#if UNITY_ECS_100            
+            _EManager.AddSharedComponent(dotsEntity, new DOTSSveltoGroupID(egid.groupID));
+#else
+            _EManager.AddSharedComponentData(dotsEntity, new DOTSSveltoGroupID(egid.groupID));
+#endif
+            _EManager.AddComponent<DOTSSveltoEGID>(dotsEntity);
+            _EManager.SetComponentData(dotsEntity, new DOTSSveltoEGID(egid));
 
             return dotsEntity;
         }
@@ -79,7 +90,7 @@ namespace Svelto.ECS.SveltoOnDOTS
         /// <param name="wireEgid"></param>
         /// <returns></returns>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        internal Entity CreateDOTSEntity(EntityArchetype archetype)
+        public Entity CreateDOTSEntity(EntityArchetype archetype)
         {
             return _EManager.CreateEntity(archetype);
         }
@@ -110,12 +121,25 @@ namespace Svelto.ECS.SveltoOnDOTS
             _EManager.AddComponent<T>(dotsEntity);
             _EManager.SetComponentData(dotsEntity, component);
         }
+        
+        public T GetComponent<T>(Entity dotsEntity) where T : unmanaged, IComponentData
+        {
+#if UNITY_ECS_100                        
+            return _EManager.GetComponentData<T>(dotsEntity);
+#else
+            return _EManager.GetComponentData<T>(dotsEntity);
+#endif
+        }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public void AddSharedComponent<T>(Entity dotsEntity, in T component)
                 where T : unmanaged, ISharedComponentData
         {
+#if UNITY_ECS_100               
             _EManager.AddSharedComponent(dotsEntity, component);
+#else
+            _EManager.AddSharedComponentData(dotsEntity, component);
+#endif
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
@@ -124,12 +148,27 @@ namespace Svelto.ECS.SveltoOnDOTS
         {
             _EManager.AddBuffer<T>(dotsEntity);
         }
+      
+#if !(DEBUG && !PROFILE_SVELTO)
+        [System.Diagnostics.Conditional("NO_SENSE")]    
+#endif
+        public void SetDebugName(Entity dotsEntity, string name)
+        {
+            _EManager.SetName(dotsEntity, name);
+        }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public void SetSharedComponentBatched<SharedComponentData>(NativeArray<Entity> nativeArray, SharedComponentData SCD)
                 where SharedComponentData : unmanaged, ISharedComponentData
         {
+#if UNITY_ECS_100
             _EManager.SetSharedComponent(nativeArray, SCD);
+#else            
+            for (int i = 0; i < nativeArray.Length; i++)
+            {
+                _EManager.SetSharedComponentData(nativeArray[i], SCD);
+            }
+#endif
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
@@ -138,8 +177,9 @@ namespace Svelto.ECS.SveltoOnDOTS
             _EManager.AddComponent<T>(DOTSEntities);
         }
 
+        //can't support publicly the version without DOTSSveltoEGID now
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public NativeArray<Entity> CreateDOTSEntityFromSveltoBatched(Entity prefab, (uint rangeStart, uint rangeEnd) range,
+        NativeArray<Entity> CreateDOTSEntityFromSveltoBatched(Entity prefab, (uint rangeStart, uint rangeEnd) range,
             ExclusiveGroupStruct groupID, NB<DOTSEntityComponent> DOSTEntityComponents)
         {
             unsafe
@@ -148,7 +188,15 @@ namespace Svelto.ECS.SveltoOnDOTS
 
                 var count = (int)(range.rangeEnd - range.rangeStart);
                 var nativeArray = _EManager.Instantiate(prefab, count, _EManager.World.UpdateAllocator.ToAllocator);
+                
+#if UNITY_ECS_100                
                 _EManager.AddSharedComponent(nativeArray, new DOTSSveltoGroupID(groupID));
+#else
+                for (int i = 0; i < nativeArray.Length; i++)
+                {
+                    _EManager.AddSharedComponentData(nativeArray[i], new DOTSSveltoGroupID(groupID));
+                }
+#endif
 
                 var setDOTSEntityComponentsJob = new SetDOTSEntityComponents
                 {
@@ -164,25 +212,24 @@ namespace Svelto.ECS.SveltoOnDOTS
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public NativeArray<Entity> CreateDOTSEntityFromSveltoBatched(Entity prefab, (uint rangeStart, uint rangeEnd) range,
-            ExclusiveGroupStruct groupID, NB<DOTSEntityComponent> DOSTEntityComponents,
-            SharedSveltoDictionaryNative<uint, EntityReference> referenceMap, NativeEntityIDs sveltoIds, out JobHandle creationJob)
+            ExclusiveGroupStruct groupID, NB<DOTSEntityComponent> DOSTEntityComponents, NativeEntityIDs sveltoIds, out JobHandle creationJob)
         {
             var nativeArray = CreateDOTSEntityFromSveltoBatched(prefab, range, groupID, DOSTEntityComponents);
             unsafe
             {
                 var count = (int)(range.rangeEnd - range.rangeStart);
                 
-                _EManager.AddComponent<DOTSSveltoReference>(nativeArray);
+                _EManager.AddComponent<DOTSSveltoEGID>(nativeArray);
 
-                var SetDOTSSveltoReferenceJob = new SetDOTSSveltoReference
+                var SetDOTSSveltoEGIDJob = new SetDOTSSveltoEGID
                 {
                     sveltoStartIndex = range.rangeStart,
                     createdEntities = nativeArray,
                     entityManager = _EManager,
                     ids = sveltoIds,
-                    entityReferenceMap = referenceMap,
+                    groupID = groupID
                 };
-                creationJob = *_jobHandle = JobHandle.CombineDependencies(*_jobHandle, SetDOTSSveltoReferenceJob.ScheduleParallel(count, default));
+                creationJob = *_jobHandle = JobHandle.CombineDependencies(*_jobHandle, SetDOTSSveltoEGIDJob.ScheduleParallel(count, default));
 
                 return nativeArray;
             }
@@ -229,13 +276,13 @@ namespace Svelto.ECS.SveltoOnDOTS
         }
 
         [BurstCompile]
-        public struct SetDOTSSveltoReference: IJobParallelFor
+        public struct SetDOTSSveltoEGID: IJobParallelFor
         {
             public uint sveltoStartIndex;
             [ReadOnly] public NativeArray<Entity> createdEntities;
             [NativeDisableParallelForRestriction] public EntityManager entityManager;
             public NativeEntityIDs ids;
-            public SharedSveltoDictionaryNative<uint, EntityReference> entityReferenceMap;
+            public ExclusiveGroupStruct groupID;
 
             public void Execute(int currentIndex)
             {
@@ -243,9 +290,9 @@ namespace Svelto.ECS.SveltoOnDOTS
                 var dotsEntity = createdEntities[currentIndex];
 
                 entityManager.SetComponentData(
-                    dotsEntity, new DOTSSveltoReference
+                    dotsEntity, new DOTSSveltoEGID
                     {
-                        entityReference = entityReferenceMap[ids[index]]
+                        egid = new EGID(ids[index], groupID)
                     });
             }
         }

com.sebaslab.svelto.ecs/Extensions/Unity/DOTS/UECS/ISveltoOnDOTSSubmission.cs

@@ -4,10 +4,7 @@ using Unity.Jobs;
 namespace Svelto.ECS.SveltoOnDOTS
 {
     /// <summary>
-    /// Note: we don't want implementations of ISveltoDOTSSubmission
-    /// to be able to add directly Submission or HandleLifeTime engines as
-    /// the implementation are not aware of EnginesRoot so cannot satisfy Engines
-    /// that implement IEngine interfaces 
+    /// this interface exists to allow the user to submig entities explicitly
     /// </summary>
     public interface ISveltoOnDOTSSubmission
     {

com.sebaslab.svelto.ecs/Extensions/Unity/DOTS/UECS/SveltoOnDOTSComponents.cs

@@ -30,16 +30,16 @@ namespace Svelto.ECS.SveltoOnDOTS
     /// <summary>
     /// DOTS component to keep track of the associated Svelto.ECS entity
     /// </summary>
-    public struct DOTSSveltoReference: IComponentData
+    public struct DOTSSveltoEGID: IComponentData
     {
-        public EntityReference entityReference;
+        public EGID egid;
 
-        public DOTSSveltoReference(EntityReference eEntityReference)
+        public DOTSSveltoEGID(EGID egid)
         {
-            entityReference = eEntityReference;
+            this.egid = egid;
         }
     }
-
+    
     /// <summary>
     /// DOTS component to be able to query all the DOTS entities found in a Svelto.ECS group
     /// </summary>

com.sebaslab.svelto.ecs/Extensions/Unity/DOTS/UECS/SveltoOnDOTSCreationEngine.cs

@@ -10,7 +10,10 @@ namespace Svelto.ECS.SveltoOnDOTS
         DOTSOperationsForSvelto DOTSOperations { get; set; }
 
         string name { get; }
-        
+
+        //use case is i.e. to create archetypes once
+        void OnOperationsReady();
+        //use case is i.e. to operate once per submission on entities just created
         void OnPostSubmission();
     }
 }

com.sebaslab.svelto.ecs/Extensions/Unity/DOTS/UECS/SveltoOnDOTSEnginesGroup.cs

@@ -39,6 +39,7 @@ namespace Svelto.ECS.SveltoOnDOTS
         /// for the user to add pure DOTS ECS SystemBase/ISystem systems to the DOTS ECS world
         /// </summary>
         public World world { get; private set; }
+        public ISveltoOnDOTSSubmission submitter => _sveltoDotsEntitiesSubmissionGroup;
 
         public JobHandle Execute(JobHandle inputDeps)
         {
@@ -62,7 +63,11 @@ namespace Svelto.ECS.SveltoOnDOTS
         public void AddSveltoToDOTSSyncEngine(SyncSveltoToDOTSEngine engine)
         {
             //it's a Svelto Engine/DOTS ECS SystemBase so it must be added in the DOTS ECS world AND svelto enginesRoot
+#if UNITY_ECS_100
             world.AddSystemManaged(engine);
+#else            
+            world.AddSystem(engine);
+#endif
 
             _enginesRoot.AddEngine(engine);
 
@@ -72,7 +77,11 @@ namespace Svelto.ECS.SveltoOnDOTS
         public void AddDOTSToSveltoSyncEngine(SyncDOTSToSveltoEngine engine)
         {
             //it's a Svelto Engine/DOTS ECS SystemBase so it must be added in the DOTS ECS world AND svelto enginesRoot
+#if UNITY_ECS_100
             world.AddSystemManaged(engine);
+#else            
+            world.AddSystem(engine);
+#endif
             _enginesRoot.AddEngine(engine);
 
             _syncDotsToSveltoGroup.Add(engine);
@@ -108,7 +117,11 @@ namespace Svelto.ECS.SveltoOnDOTS
             _sveltoDotsEntitiesSubmissionGroup.Add(defaultSveltoOnDotsHandleLifeTimeEngine);
             
             enginesRoot.AddEngine(_sveltoDotsEntitiesSubmissionGroup);
+#if UNITY_ECS_100            
             world.AddSystemManaged(_sveltoDotsEntitiesSubmissionGroup);
+#else
+            world.AddSystem(_sveltoDotsEntitiesSubmissionGroup);
+#endif
             
             //This is the group that handles the DOTS ECS sync systems that copy the svelto entities values to DOTS ECS entities
             _syncSveltoToDotsGroup = new SyncSveltoToDOTSGroup();

com.sebaslab.svelto.ecs/Extensions/Unity/DOTS/UECS/SveltoOnDOTSEntitiesSubmissionGroup.cs

@@ -1,12 +1,11 @@
 #if UNITY_ECS
-#if !UNITY_DISABLE_AUTOMATIC_SYSTEM_BOOTSTRAP_RUNTIME_WORLD
+#if !UNITY_DISABLE_AUTOMATIC_SYSTEM_BOOTSTRAP_RUNTIME_WORLD && !UNITY_DISABLE_AUTOMATIC_SYSTEM_BOOTSTRAP
 #error SveltoOnDOTS required the user to take over the DOTS world control and explicitly create it. UNITY_DISABLE_AUTOMATIC_SYSTEM_BOOTSTRAP must be defined
 #endif
 using System;
 using Svelto.Common;
 using Svelto.DataStructures;
 using Svelto.ECS.Schedulers;
-using Unity.Collections.LowLevel.Unsafe;
 using Unity.Entities;
 using Unity.Jobs;
 
@@ -25,7 +24,7 @@ namespace Svelto.ECS.SveltoOnDOTS
     ///     ISveltoOnDOTSStructuralEngine can use DOTSOperationsForSvelto in their add/remove/moove callbacks
     /// </summary>
     [DisableAutoCreation]
-    public sealed partial class SveltoOnDOTSEntitiesSubmissionGroup: SystemBase, IQueryingEntitiesEngine, ISveltoOnDOTSSubmission
+    public sealed partial class SveltoOnDOTSEntitiesSubmissionGroup: SystemBase, IQueryingEntitiesEngine, ISveltoOnDOTSSubmission 
     {
         public SveltoOnDOTSEntitiesSubmissionGroup(SimpleEntitiesSubmissionScheduler submissionScheduler)
         {
@@ -47,7 +46,11 @@ namespace Svelto.ECS.SveltoOnDOTS
                 using (profiler.Sample("Complete All Pending Jobs"))
                 {
                     jobHandle.Complete(); //sync-point
+#if UNITY_ECS_100
                     EntityManager.CompleteAllTrackedJobs();
+#else                    
+                    EntityManager.CompleteAllJobs();
+#endif
                 }
 
                 //Submit Svelto Entities, calls Add/Remove/MoveTo that can be used by the DOTS ECSSubmissionEngines
@@ -64,7 +67,10 @@ namespace Svelto.ECS.SveltoOnDOTS
         {
             _submissionEngines.Add(engine);
             if (World != null)
+            {
                 engine.DOTSOperations = _dotsOperationsForSvelto;
+                engine.OnOperationsReady();
+            }
         }
 
         protected override void OnCreate()
@@ -76,7 +82,10 @@ namespace Svelto.ECS.SveltoOnDOTS
             
                 //initialise engines field while world was null
                 foreach (var engine in _submissionEngines)
+                {
                     engine.DOTSOperations = _dotsOperationsForSvelto;
+                    engine.OnOperationsReady();
+                }
             }
         }
 

com.sebaslab.svelto.ecs/Extensions/Unity/DOTS/UECS/SveltoOnDOTSHandleLifeTimeEngine.cs

@@ -8,16 +8,17 @@ namespace Svelto.ECS.SveltoOnDOTS
     /// Automatic Svelto Group -> DOTS archetype synchronization when necessary
     /// </summary>
     /// <typeparam name="DOTSEntityComponent"></typeparam>
-    class SveltoOnDOTSHandleLifeTimeEngine<DOTSEntityComponent>: ISveltoOnDOTSStructuralEngine, IReactOnRemoveEx<DOTSEntityComponent>,
+    public class SveltoOnDOTSHandleLifeTimeEngine<DOTSEntityComponent>: ISveltoOnDOTSStructuralEngine, IReactOnRemoveEx<DOTSEntityComponent>,
             IReactOnSwapEx<DOTSEntityComponent> where DOTSEntityComponent : unmanaged, IEntityComponentForDOTS
     {
         public void Remove((uint start, uint end) rangeOfEntities, in EntityCollection<DOTSEntityComponent> entities, ExclusiveGroupStruct groupID)
         {
+            //todo burstify all of this if DOTS 1.0 is on
+            
             var (buffer, _) = entities;
 
             var nativeArray = new NativeArray<Entity>((int)(rangeOfEntities.end - rangeOfEntities.start), Allocator.Temp);
 
-            //todo this could be burstified or memcpied
             int counter = 0;
             for (uint i = rangeOfEntities.start; i < rangeOfEntities.end; i++)
                 nativeArray[counter++] = buffer[i].dotsEntity;
@@ -28,19 +29,25 @@ namespace Svelto.ECS.SveltoOnDOTS
         public void MovedTo((uint start, uint end) rangeOfEntities, in EntityCollection<DOTSEntityComponent> entities,
             ExclusiveGroupStruct _, ExclusiveGroupStruct toGroup)
         {
-            var (buffer, _) = entities;
+            //todo burstify all of this if DOTS 1.0 is on
+
+            var (buffer, ids, _) = entities;
 
             var nativeArray = new NativeArray<Entity>((int)(rangeOfEntities.end - rangeOfEntities.start), Allocator.Temp);
 
-            //todo this could be burstified or memcpied
             int counter = 0;
             for (uint i = rangeOfEntities.start; i < rangeOfEntities.end; i++)
                 nativeArray[counter++] = buffer[i].dotsEntity;
 
             DOTSOperations.SetSharedComponentBatched(nativeArray, new DOTSSveltoGroupID(toGroup));
+            
+            counter = 0;
+            for (uint i = rangeOfEntities.start; i < rangeOfEntities.end; i++)
+                DOTSOperations.SetComponent(nativeArray[counter++], new DOTSSveltoEGID(new EGID(ids[i], toGroup)));
         }
-        
-        public void OnPostSubmission() { }
+
+        public void OnOperationsReady() {}
+        public void OnPostSubmission() {}
 
         public DOTSOperationsForSvelto DOTSOperations { get; set; }
         public string name => nameof(SveltoOnDOTSHandleLifeTimeEngine<DOTSEntityComponent>);

com.sebaslab.svelto.ecs/package.json

@@ -19,7 +19,7 @@
     "svelto.ecs"
   ],
   "name": "com.sebaslab.svelto.ecs",
-  "version": "3.4.1",
+  "version": "3.4.2",
   "type": "library",
   "unity": "2020.3"
 }

com.sebaslab.svelto.ecs/version.json

@@ -1,3 +1,3 @@
 {
-  "version": "3.4.1"
+  "version": "3.4.2"
 }