How to use the qsharp.client.get_operation_metadata function in qsharp

def __getattr__(self, name):
        ops = qsharp.get_available_operations_by_namespace()
        if name in ops[self._qs_name]:
            op_cls = new_class(name, (QSharpCallable, ))

            # Copy over metadata from the operation's header.
            metadata = qsharp.client.get_operation_metadata(f"{self._qs_name}.{name}")
            op_cls.__doc__ = metadata.get('documentation', '')
            op_cls.__file__ = metadata.get('source', None)
            return op_cls(f"{self._qs_name}.{name}", "workspace")
        raise AttributeError(f"Q# namespace {self._qs_name} does not contain a callable {name}.")