<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def conversations_replies(self, *, channel: str, ts: str, **kwargs) -> SlackResponse: """Retrieve a thread of messages posted to a conversation Args: channel (str):
 Conversation ID to fetch thread from. e.g. 'C1234567890' ts (str):
 Unique identifier of a thread's parent message. e.g. '1234567890.123456' """

        kwargs.update({"channel": channel, "ts": ts})
        return self.api_call("conversations.replies", http_verb="GET", params=kwargs)