code: public function getField($selector)
      {
          for ($i = 0; $i < count($this->forms); $i++) {
              $value = $this->forms[$i]->getValue($selector);
              if (isset($value)) {
                  return $value;
              }
          }
  
          return;
      }
docs: Accessor for a form element value within a page.
  
  @param SimpleSelector $selector    Field finder.
  
  @return string/boolean             A string if the field is present, false if unchecked and
  null if missing.