Flags that can be used to control which overrides shoud be kept or cleared when using ReplacePrefabAssetOfPrefabInstance.
| KeepAllPossibleOverrides | Keep all possible overrides (default value). | 
| ClearNonDefaultPropertyOverrides | Clear any non-default property overrides from the Prefab instance. | 
| ClearAddedComponents | Clear any added Component overrides from the Prefab instance. | 
| ClearRemovedComponents | Clear any removed Component overrides from the Prefab instance. | 
| ClearAddedGameObjects | Clear any added GameObject overrides from the Prefab instance. | 
| ClearRemovedGameObjects | Clear any removed GameObject overrides from the Prefab instance. | 
| ClearAllOverridesExceptPropertyOverrides | Clear all added and removed GameObjects and Components but keep all possible property overrides. | 
| ClearAllNonDefaultOverrides | Clear any non-default property overrides from the Prefab instance. |