public function getSubDirs($depth = 0)
	{
		$dirs = [];

		$contents = $this->hasAdapterOrFail()->adapter->listContents($this->getPath(), false);
		foreach ($contents as $item)
		{
			if ($item->isDir())
			{
				$thisDir = new stdClass();
				$thisDir->depth = $depth;
				$thisDir->subdirs = $item->getSubDirs($depth+1);
				$thisDir->name = $item->getDisplayName();
				$thisDir->path = $item->getPath();
				$dirs[] = $thisDir;
			}
		}
		return $dirs;
	}