def describe_signature(self, signode: TextElement, mode: str, env: 'BuildEnvironment', symbol: 'Symbol') -> None:
    verify_description_mode(mode)
    if self.ellipsis:
        signode += nodes.Text('...')
    else:
        self.arg.describe_signature(signode, mode, env, symbol=symbol)
def describe_signature(self, signode: TextElement, mode: str, env: 'BuildEnvironment', symbol: 'Symbol') -> None:
    verify_description_mode(mode)
    if self.ellipsis:
        signode += nodes.Text('...')
    else:
        self.arg.describe_signature(signode, mode, env, symbol=symbol)