phake\CycleDetector::mark_node PHP Method

    private function &mark_node($task_node)
    {
        $task_key = $this->task_key($task_node);
        $this->marked_nodes[$task_key] = array('task_node' => $task_node, 'index' => $this->current_index, 'lowlink' => $this->current_index, 'on_stack' => true);
        return $this->marked_nodes[$task_key];
    }