Resource/SingleUseQueue.php
public function add($resource)
    {
        if (!isset($this->added[$path = $resource->getPath()])) {
            $this->queue->add($resource);
            $this->added[$path] = true;
        }
    }
public function add($resource)
    {
        if (!isset($this->added[$path = $resource->getPath()])) {
            $this->queue->add($resource);
            $this->added[$path] = true;
        }
    }
Adds a resource to the queue.

@param \Orbt\ResourceMirror\Resource\Resource $resource