@property
def help(cls):
    """
        Property which creates a dynamic help text including the
        ``server_name`` and ``server_class``.
        """
    return (
        'Start %(server_name)s (server_class=%(server_module)s.%(server_class)s'
         % {'server_name': cls.server_name, 'server_module': cls.
        server_class.__module__, 'server_class': cls.server_class.__name__})
