src/Template/Processor/Processor.php
protected static function before(Element $element, string $phpExpression): void
    {
        $element->insertBeforeSelf(
            static::toPhp($phpExpression)
        );
    }
protected static function before(Element $element, string $phpExpression): void
    {
        $element->insertBeforeSelf(
            static::toPhp($phpExpression)
        );
    }
protected static function before ( Element $ element , string $ phpExpression ) : void { $ element -> insertBeforeSelf ( static :: toPhp ( $ phpExpression ) ) ; }
insert a php code before an element.

@param Element $element
@param string  $phpExpression
insert a php code before an element .