gan_node_html.php
function changeParent($to, &$index = null) {
	#php5e
		if ($this->parent !== null) {
			$this->parent->deleteChild($this, true);
		}
		$this->parent = $to;
		if ($index !== false) {
			$new_index = $this->index();
			if (!(is_int($new_index) && ($new_index >= 0))) {
				$this->parent->addChild($this, $index);
			}
		}
	}
function changeParent($to, &$index = null) {
	#php5e
		if ($this->parent !== null) {
			$this->parent->deleteChild($this, true);
		}
		$this->parent = $to;
		if ($index !== false) {
			$new_index = $this->index();
			if (!(is_int($new_index) && ($new_index >= 0))) {
				$this->parent->addChild($this, $index);
			}
		}
	}
#php5