/**
* @param NodeInterface $node
*/
public function addChildNode(NodeInterface $node)
{
$node->setParent($this->getNode());
$this->childNodes[] = $node;
}
/**
* {@inheritdoc}
*/
public function add(NodeInterface $node)
{
$this->children[$node->hashCode()] = $node->setParent($this);
return $this;
}
public function replaceChild($key, NodeInterface $node)
{
if (!isset($this->children[$key])) {
throw new \InvalidArgumentException(sprintf("%s child does not exist", $key));
}
$node->setParent($this);
$this->children[$key] = $node;
}
/**
* Set child
*
* @param int $position
* @param NodeInterface|null $child
* @return $this
*/
public function setChild($position, NodeInterface $child = null)
{
$this->children[$position] = $child;
if (null !== $child) {
$child->setParent($this)->setPosition($position);
}
return $this;
}
public function appendChild(NodeInterface $node)
{
$node->setParent($this);
$this->children->add($node);
return $this;
}
