Updated ContainerHelpers to use new extensions (#2530)

Co-authored-by: David Tan <>

Content.Shared/GameObjects/Components/Movement/SharedSlipperyComponent.cs

@@ -59,7 +59,7 @@ namespace Content.Shared.GameObjects.Components.Movement
         private bool TrySlip(IEntity entity)
         {
             if (!Slippery
-                || ContainerHelpers.IsInContainer(Owner)
+                || Owner.IsInContainer()
                 ||  _slipped.Contains(entity.Uid)
                 ||  !entity.TryGetComponent(out SharedStunnableComponent stun)
                 ||  !entity.TryGetComponent(out IPhysicsComponent otherBody)

Content.Shared/GameObjects/Components/SharedStackComponent.cs

@@ -27,7 +27,7 @@ namespace Content.Shared.GameObjects.Components
                 _count = value;
                 if (_count <= 0)
                 {
-                    if (ContainerHelpers.TryGetContainerMan(Owner, out var containerManager))
+                    if (Owner.TryGetContainerMan(out var containerManager))
                     {
                         containerManager.Remove(Owner);
                     }

Content.Shared/GameObjects/EntitySystems/ExamineSystemShared.cs

@@ -58,7 +58,7 @@ namespace Content.Shared.GameObjects.EntitySystems
 
             Ignored predicate = entity => entity == examiner || entity == examined;
 
-            if (ContainerHelpers.TryGetContainer(examiner, out var container))
+            if (examiner.TryGetContainer(out var container))
             {
                 predicate += entity => entity == container.Owner;
             }

Content.Shared/GameObjects/Verbs/VerbUtility.cs

@@ -86,7 +86,7 @@ namespace Content.Shared.GameObjects.Verbs
         {
             if (!user.IsInSameOrNoContainer(target))
             {
-                if (!ContainerHelpers.TryGetContainer(target, out var container) ||
+                if (!target.TryGetContainer(out var container) ||
                     container.Owner != user)
                 {
                     return false;