/**
  * Constructs a new ezcTemplateExpressionTstNode
  *
  * @param ezcTemplateSourceCode $source
  * @param ezcTemplateCursor $start
  * @param ezcTemplateCursor $end
  */
 public function __construct(ezcTemplateSourceCode $source, $start, $end)
 {
     parent::__construct($source, $start, $end);
 }