()
:return: the scheme for this config source, for example file:// or pkg://
:return: the scheme for this config source, for example file:// or pkg://
: return : the scheme for this config source for example file : // or pkg : //
def scheme() -> str:
        """
        :return: the scheme for this config source, for example file:// or pkg://
        """
        ...
def scheme ( ) -> str : ...