code: public function getActiveFormActual($setDefault = true)
      {
          $key = null;
          if (!empty($this->activeForms)) {
              $key = $this->activeForms[0];
          }
          if (!isset($key) && $setDefault) {
              $formsAvailable = array_keys($this->forms);
              $key = array_shift($formsAvailable);
          }
          return $key;
      }
docs: get the actual active Form
  @param bool $setDefault
  @return mixed|null