protected function getRoutineArgs(): string
  {
    $ret = '';

    foreach ($this->routine['parameters'] as $parameter_info)
    {
      $mangledName = $this->nameMangler->getParameterName($parameter_info['parameter_name']);

      if ($ret) $ret .= ',';
      $ret .= DataTypeHelper::escapePhpExpression($parameter_info, '$'.$mangledName, $this->lobAsStringFlag);
    }

    return $ret;
  }