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* @license GNU General Public License version 2 or later; see LICENSE.txt */ namespace Joomla\CMS\Tree; \defined('JPATH_PLATFORM') or die; /** * Interface for a node class * * @since 4.0.0 */ interface NodeInterface extends ImmutableNodeInterface { /** * Set the parent of this node * * If the node already has a parent, the link is unset * * @param NodeInterface|null $parent NodeInterface for the parent to be set or null * * @return void * * @since 4.0.0 */ public function setParent(NodeInterface $parent); /** * Add child to this node * * If the child already has a parent, the link is unset * * @param NodeInterface $child The child to be added. * * @return void * * @since 4.0.0 */ public function addChild(NodeInterface $child); /** * Remove a specific child * * @param NodeInterface $child Child to remove * * @return void * * @since 4.0.0 */ public function removeChild(NodeInterface $child); /** * Function to set the left or right sibling of a node * * @param NodeInterface $sibling NodeInterface object for the sibling * @param boolean $right If set to false, the sibling is the left one * * @return void * * @since 4.0.0 */ public function setSibling(NodeInterface $sibling, $right = true); }