Asynchronous load request from the Resources bundle.
See Also: Resources.LoadAsync, AsyncOperation.
| asset | Asset object being loaded (Read Only). | 
| allowSceneActivation | Allow scenes to be activated as soon as it is ready. | 
| isDone | Has the operation finished? (Read Only) | 
| priority | Priority lets you tweak in which order async operation calls will be performed. | 
| progress | What's the operation's progress. (Read Only) |