Future.catch

Description:

[ CCode ( cname = "dex_future_catch" , has_construct_function = false ) ]
public Future.catch (owned Future future, owned FutureCallback callback)

Calls callback when future rejects.

If future resolves, then callback will not be called.

Parameters:

future	a [class@Dex.Future]
callback	a callback to execute
callback_data	closure data for `callback`
callback_data_destroy	destroy notify for `callback_data`

Returns:

a [class@Dex.Future]