kernel/private/classes/ezptopologicalsortnode.php
public function registerParent( ezpTopologicalSortNode $parentNode )
    {
        if (! $this->parents->contains( $parentNode ) )
            $this->parents->attach( $parentNode );
    }
public function registerParent( ezpTopologicalSortNode $parentNode )
    {
        if (! $this->parents->contains( $parentNode ) )
            $this->parents->attach( $parentNode );
    }
public function registerParent ( ezpTopologicalSortNode $ parentNode ) { if ( ! $ this -> parents -> contains ( $ parentNode ) ) $ this -> parents -> attach ( $ parentNode ) ; }
Register a parent node.

@param ezpTopologicalSortNode $parentNode Parent node to register
Register a parent node .