def validate_response(response)
      case response
      when *SERVER_ERRORS
        raise ::Lgtm::Errors::UnexpectedError
      when *CLIENT_ERRORS
        raise ::Lgtm::Errors::UnexpectedError
      end
    end
def validate_response(response)
      case response
      when *SERVER_ERRORS
        raise ::Lgtm::Errors::UnexpectedError
      when *CLIENT_ERRORS
        raise ::Lgtm::Errors::UnexpectedError
      end
    end
validate_response is response validating

 @param [Net::HTTPxxx] response Net::HTTP responses
 @raise ::Lgtm::Errors::UnexpectedError
 @return [void]