<?php 
require_once dirname(dirname(__DIR__)) . "/css-parser/css-helper.php"; 
require_once dirname(dirname(__DIR__)) . "/css-parser/filters/css-pseudo-filter.php"; 
 
class CSSPseudoFirstChildFilter extends CSSPseudoFilter { 
     
    /** 
     * Does the node match? 
     * @param DOMElement $node 
     * @return boolean 
     */ 
    public function match($node) { 
        return !CSSHelper::getPreviousSiblingElement($node); 
    } 
} 
 
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