Result of Asset delete operation
| DidNotDelete | Tells the internal implementation that the callback did not delete the asset. The asset will be delete by the internal implementation. |
| FailedDelete | Tells Unity that the file cannot be deleted and Unity should leave it alone. |
| DidDelete | Tells Unity that the asset was deleted by the callback. Unity will not try to delete the asset, but will delete the cached version and preview file. |