(BREAKING) Replace structs with classes

Framework/Editor/V1/Aac.cs

@@ -50,7 +50,7 @@ namespace AnimatorAsCode.V1
         }
     }
 
-    public struct AacFlLayer
+    public class AacFlLayer
     {
         private readonly AnimatorController _animatorController;
         private readonly AacConfiguration _configuration;

Framework/Editor/V1/AacAnimatorNode.cs

@@ -1,5 +1,3 @@
-using System;
-using System.Collections.Generic;
 using UnityEngine;
 
 // ReSharper disable once CheckNamespace
@@ -16,9 +14,6 @@ namespace AnimatorAsCode.V1
         protected readonly AacFlStateMachine ParentMachine;
         protected readonly IAacDefaultsProvider DefaultsProvider;
 
-        // TODO: What is this for???
-        protected Dictionary<Type, object> behaviorCache = new Dictionary<Type, object>();
-
         protected AacAnimatorNode(AacFlStateMachine parentMachine, IAacDefaultsProvider defaultsProvider)
         {
             ParentMachine = parentMachine;

Framework/Editor/V1/AacFlAnimations.cs

@@ -7,7 +7,7 @@ using UnityEngine;
 // ReSharper disable once CheckNamespace
 namespace AnimatorAsCode.V1
 {
-    public readonly struct AacFlClip
+    public class AacFlClip
     {
         private readonly AacConfiguration _component;
         public AnimationClip Clip { get; }
@@ -146,7 +146,7 @@ namespace AnimatorAsCode.V1
         }
     }
 
-    public readonly struct AacFlEditClip
+    public class AacFlEditClip
     {
         private readonly AacConfiguration _component;
         public AnimationClip Clip { get; }

Framework/Editor/V1/AacFlStates.cs

@@ -308,9 +308,6 @@ namespace AnimatorAsCode.V1
 
         public override TBehaviour EnsureBehaviour<TBehaviour>()
         {
-            if (behaviorCache.TryGetValue(typeof(TBehaviour), out var existingBehavior))
-                return (TBehaviour)existingBehavior;
-
             foreach (var behaviour in Machine.behaviours)
                 if (behaviour is TBehaviour myBehaviour)
                     return myBehaviour;
@@ -462,9 +459,6 @@ namespace AnimatorAsCode.V1
 
         public override TBehaviour EnsureBehaviour<TBehaviour>()
         {
-            if (behaviorCache.TryGetValue(typeof(TBehaviour), out var existingBehavior))
-                return (TBehaviour)existingBehavior;
-
             foreach (var behaviour in State.behaviours)
                 if (behaviour is TBehaviour myBehaviour)
                     return myBehaviour;