gan_node_html.php
function setPlainText($text) {
		$this->clear();
		if (trim($text)) {
			$this->addText(htmlentities($text, ENT_QUOTES));
		}
	}
function setPlainText($text) {
		$this->clear();
		if (trim($text)) {
			$this->addText(htmlentities($text, ENT_QUOTES));
		}
	}
Similar to JavaScript plainText, will replace child nodes with new text (literal)
@param string $text