$xml = $parser->preprocessToDom( $this->content->getText() )->__toString();
$result_array['parsetree'] = $xml;
$result_array[ApiResult::META_BC_SUBELEMENTS][] = 'parsetree';
$xml = $parser->preprocessToDom( $this->content->getText() )->__toString();
$result_array['parsetree'] = $xml;
$result_array[ApiResult::META_BC_SUBELEMENTS][] = 'parsetree';