(internal) calls the next method of weaved tasks until they are finished
        or The ``Plumber`` instance is stopped see: ``Dagger.chinkup``.

def _plunge(tasks, pausing, finish):
        """
        (internal) calls the next method of weaved tasks until they are finished
        or The ``Plumber`` instance is stopped see: ``Dagger.chinkup``.
        """
        # If no result received either not started or start & stop
        # could have been called before the plunger thread
        while True:
            if pausing():
                tasks.stop()
            try:
                tasks.next()
            except StopIteration:
                finish(pausing())
                break