Close this prompt asynchronously.
After calling this function, no further methods may be called on this object. The prompt object is not unreferenced by this function, and you must unreference it once done.
This call returns immediately and completes asynchronously.
| this |
the prompt |
| cancellable |
an optional cancellation object |
| callback |
called when the operation completes |
| user_data |
data to pass to the callback |