/**
  * Generates code for a function
  *
  * @param XmlImportAstFunction $function
  * @return string
  */
 private function generateForMath(XmlImportAstMath $math)
 {
     $result = '';
     $arguments = $math->getArguments();
     for ($i = 0; $i < count($arguments); $i++) {
         $result .= $this->generateForExpression($arguments[$i], true);
     }
     return 'number_format(' . str_replace("\"", "", $result) . ',2)';
 }