code: public function getFormById($id)
      {
          for ($i = 0; $i < count($this->forms); $i++) {
              if ($this->forms[$i]->getId() == $id) {
                  return $this->forms[$i];
              }
          }
  
          return;
      }
docs: Finds a held form by the form ID.
  A way of identifying a specific form when we have control of the HTML code.
  
  @param string $id     Form label.
  
  @return SimpleForm    Form object containing the matching ID.