public ComparisonViewPopup(Object source, Object instance, PrefabOverride modification, PrefabOverridesTreeView owner)
            {
                m_Owner        = owner;
                m_Source       = source;
                m_Instance     = instance;
                m_Modification = modification;
                if (modification != null)
                {
                    m_Unappliable = !PrefabUtility.IsPartOfPrefabThatCanBeAppliedTo(modification.GetAssetObject());
                }
                else
                {
                    m_Unappliable = false;
                }

                if (m_Source != null)
                {
                    m_SourceEditor = Editor.CreateEditor(m_Source);
                }
                if (m_Instance != null)
                {
                    m_InstanceEditor = Editor.CreateEditor(m_Instance);
                }

                if (m_Source == null || m_Instance == null || m_Modification == null)
                {
                    m_PreviewSize.x /= 2;
                }

                if (modification is ObjectOverride)
                {
                    Undo.postprocessModifications += RecheckOverrideStatus;
                }
            }
        bool OperateSelectedOverrides(PrefabUtility.OverrideOperation operation)
        {
            List <PrefabOverride> overrides = new List <PrefabOverride>();

            // Get all overrides from selection. Immediately accept any overrides with no dependencies.
            var selection = m_TreeView.GetSelection();

            for (int i = 0; i < selection.Count; i++)
            {
                PrefabOverride singleOverride = m_TreeView.FindOverride(selection[i]);
                if (singleOverride != null)
                {
                    overrides.Add(singleOverride);
                }
            }

            bool success = PrefabUtility.ProcessMultipleOverrides(m_SelectedGameObjects[0], overrides, operation, InteractionMode.UserAction);

            if (success)
            {
                EditorUtility.ForceRebuildInspectors();
            }
            return(success);
        }