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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_docs(r_session, url, encoder=None, headers=None, **params):
 """ Provides a helper for functions that require GET or POST requests with a JSON, text, or raw response containing documents. :param r_session: Authentication session from the client :param str url: URL containing the endpoint :param JSONEncoder encoder: Custom encoder from the client :param dict headers: Optional HTTP Headers to send with the request :returns: Raw response content from the specified endpoint """

    keys_list = params.pop('keys', None)
    keys = None
    if keys_list is not None:
        keys = json.dumps({'keys': keys_list}, cls=encoder)
    f_params = python_to_couch(params)
    resp = None
    if keys is not None:
        # If we're using POST we are sending JSON so add the header
        if headers is None:
            headers = {}
        headers['Content-Type'] = 'application/json'
        resp = r_session.post(url, headers=headers, params=f_params, data=keys)
    else:
        resp = r_session.get(url, headers=headers, params=f_params)
    resp.raise_for_status()
    return resp