public function seeResponseIsXml()
    {
        libxml_use_internal_errors(true);
        $doc = simplexml_load_string($this->connectionModule->_getResponseContent());
        $num = "";
        $title = "";
        if ($doc === false) {
            $error = libxml_get_last_error();
            $num = $error->code;
            $title = trim($error->message);
            libxml_clear_errors();
        }
        libxml_use_internal_errors(false);
        \PHPUnit\Framework\Assert::assertNotSame(
            false,
            $doc,
            "xml decoding error #$num with message \"$title\", see http://www.xmlsoft.org/html/libxml-xmlerror.html"
        );
    }