CssRules.php

<?php
/*
 * citeproc-php
 *
 * @link        http://github.com/seboettg/citeproc-php for the source repository
 * @copyright   Copyright (c) 2017 Sebastian Böttger.
 * @license     https://opensource.org/licenses/MIT
 */
 
namespace Seboettg\CiteProc\Styles\Css;
 
use Seboettg\Collection\ArrayList;
 
class CssRules extends ArrayList
{
    public function getRule($rule)
    {
        if (!$this->hasKey($rule)) {
            $this->set($rule, new CssRule(substr($rule, 1), substr($rule, 0, 1)));
        }
        return $this->get($rule);
    }
}