(self)
List[str]: Specifies the entire list of physical channels on this
            collection.
List[str]: Specifies the entire list of physical channels on this
            collection.
List [ str ] : Specifies the entire list of physical channels on this collection .
def channel_names(self):
        """
        List[str]: Specifies the entire list of physical channels on this
            collection.
        """
        raise NotImplementedError()
def channel_names ( self ) : raise NotImplementedError ( )