Asynchronously calls EnsureChannel on the ChannelDispatcher to create a channel with the properties defined in
TpAccountChannelRequest:request that you are going to handle yourself.
When the operation is finished, callback will be called. You can then call
ensure_and_handle_channel_async.end to get the result of the operation.
If the channel already exists and is already being handled, or if a newly created channel is sent to a different handler, this operation will fail with the error NOT_YOURS. The other handler will be notified that the channel was requested again (for instance with re_handled, BaseClientClassHandleChannelsImpl or callback), and can move its window to the foreground, if applicable.
(Behind the scenes, this works by creating a temporary BaseClient,
then acting like ensure_channel_async with the
temporary BaseClient as the preferred_handler.)
| this | |
| cancellable |
optional Cancellable object, |
| callback |
a callback to call when the request is satisfied |
| user_data |
data to pass to |