/**
* Set node parent
* @param ZNode $a_parent
* @return ZNode
*/
public function &setParent(ZNode &$a_parent)
{
if ($this->m_parent) {
if ($this->m_parent->getId() == $a_parent->getId()) {
return $this;
}
$this->m_parent->removeChildren($this);
unset($this->m_parent);
}
$this->m_parent =& $a_parent;
$this->m_parent->addChildren($this);
return $this;
}
