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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def handle_interlude( self, obj, folder, index, ensemble, loop=None, **kwargs ):
 """Handle an interlude event. Interlude functions permit branching. They return a folder which the application can choose to adopt as the next supplier of dialogue. This handler calls the interlude with the supplied arguments and returns the result. :param obj: A callable object. :param folder: A :py:class:`~turberfield.dialogue.model.SceneScript.Folder` object. :param int index: Indicates which scene script in the folder is being processed. :param ensemble: A sequence of Python objects. :param branches: A sequence of :py:class:`~turberfield.dialogue.model.SceneScript.Folder` objects. from which to pick a branch in the action. :return: A :py:class:`~turberfield.dialogue.model.SceneScript.Folder` object. """

        if obj is None:
            return folder.metadata
        else:
            return obj(folder, index, ensemble, loop=loop, **kwargs)