code: public function setField($selector, $value, $position=false)
      {
          $is_set = false;
          for ($i = 0; $i < count($this->forms); $i++) {
              if ($this->forms[$i]->setField($selector, $value, $position)) {
                  $is_set = true;
              }
          }
  
          return $is_set;
      }
docs: Sets a field on each form in which the field is available.
  
  @param SimpleSelector $selector    Field finder.
  @param string $value               Value to set field to.
  
  @return bool                    True if value is valid.