Disconnects a handler from an instance so it will not be called during
any future or currently ongoing emissions of the signal it has been
connected to. The @handler_id becomes invalid and may be reused.
The @handler_id has to be a valid signal handler id, connected to a
signal of @instance.
Disconnects a handler from an instance so it will not be called during any future or currently ongoing emissions of the signal it has been connected to. The @handler_id becomes invalid and may be reused.
The @handler_id has to be a valid signal handler id, connected to a signal of @instance.