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Assets/ThirdParty/Mirror/Editor/SyncVarAttributeDrawer.cs

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+using UnityEditor;
+using UnityEngine;
+
+namespace Mirror
+{
+    [CustomPropertyDrawer(typeof(SyncVarAttribute))]
+    public class SyncVarAttributeDrawer : PropertyDrawer
+    {
+        static readonly GUIContent syncVarIndicatorContent = new GUIContent("SyncVar", "This variable has been marked with the [SyncVar] attribute.");
+
+        public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
+        {
+            Vector2 syncVarIndicatorRect = EditorStyles.miniLabel.CalcSize(syncVarIndicatorContent);
+            float valueWidth = position.width - syncVarIndicatorRect.x;
+
+            Rect valueRect = new Rect(position.x, position.y, valueWidth, position.height);
+            Rect labelRect = new Rect(position.x + valueWidth, position.y, syncVarIndicatorRect.x, position.height);
+
+            EditorGUI.PropertyField(valueRect, property, label, true);
+            GUI.Label(labelRect, syncVarIndicatorContent, EditorStyles.miniLabel);
+        }
+
+        public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
+        {
+            return EditorGUI.GetPropertyHeight(property);
+        }
+    }
+}