code: public function setFieldByName($name, $value, $position=false)
      {
          return $this->page->setField(new SelectByName($name), $value, $position);
      }
docs: Sets all form fields with that name. Will use label if one is available (not yet
  implemented).
  
  @param string $name    Name of field in forms.
  @param string $value   New value of field.
  
  @return bool        True if field exists, otherwise false.