public function render($htmlview = null, $textview = null) {

		if(null !== $htmlview && false === is_string($htmlview)) {
			return trigger_error(sprintf('Argument 1 passed to %s() must be of the type string, "%s" given', __METHOD__, gettype($htmlview)), E_USER_ERROR);
		}

		if(null !== $textview && false === is_string($textview)) {
			return trigger_error(sprintf('Argument 2 passed to %s() must be of the type string, "%s" given', __METHOD__, gettype($textview)), E_USER_ERROR);
		}

		$this -> viewmodels = ['html' => $htmlview, 'text' => $textview];

		return $this;
	}