public function addReferrer(ForeignKey $fk)
    {
        if ($this->referrers === null) {
            $this->referrers = array();
        }
        $this->referrers[] = $fk;
    }
public function addReferrer(ForeignKey $fk)
    {
        if ($this->referrers === null) {
            $this->referrers = array();
        }
        $this->referrers[] = $fk;
    }
public function addReferrer ( ForeignKey $ fk ) { if ( $ this -> referrers === null ) { $ this -> referrers = array ( ) ; } $ this -> referrers [ ] = $ fk ; }
Adds the foreign key from another table that refers to this column.
Adds the foreign key from another table that refers to this column .