Same as add_copy_spec_limit, except that it prepends path to SCL
        root to "copyspec".

def add_copy_spec_limit_scl(self, scl, copyspec, **kwargs):
        """Same as add_copy_spec_limit, except that it prepends path to SCL
        root to "copyspec".
        """
        self.add_copy_spec_limit(
            self.convert_copyspec_scl(scl, copyspec),
            **kwargs
        )