<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 async def _send(self, http_verb, api_url, req_args):
 """Sends the request out for transmission. Args: http_verb (str):
 The HTTP verb. e.g. 'GET' or 'POST'. api_url (str):
 The Slack API url. e.g. 'https://slack.com/api/chat.postMessage' req_args (dict):
 The request arguments to be attached to the request. e.g. { json: { 'attachments': [{"pretext": "pre-hello", "text": "text-world"}], 'channel': '#random' } } Returns: The response parsed into a SlackResponse object. """

        res = await self._request(
            http_verb=http_verb, api_url=api_url, req_args=req_args
        )
        data = {
            "client": self,
            "http_verb": http_verb,
            "api_url": api_url,
            "req_args": req_args,
        }
        return SlackResponse(**{**data, **res}).validate()