async def close_async(self):
if self._async_wait:<EOL><INDENT>await self._async_wait<EOL><DEDENT>if self._async_conn:<EOL><INDENT>conn = self._async_conn<EOL>self._async_conn = None<EOL>self._async_wait = None<EOL>self._task_data = None<EOL>await conn.close()<EOL><DEDENT>
Close async connection.