Trismegiste\Mondrian\Graph\Digraph::getSuccessor PHP Method

    public function getSuccessor(Vertex $v)
    {
        $set = null;
        if ($this->adjacency->contains($v)) {
            $set = array();
            foreach ($this->adjacency[$v] as $succ) {
                $set[] = $succ;
            }
        }
        return $set;
    }