by manfer: code clean.

          '#type' => 'checkbox',

          '#default_value' => in_array($code,$role_languages[$rid]) ? 1 : 0,

          '#attributes' => array('class' => array('rid-' . $rid)),

          // TODO: review why parents and tree doesn't work properly

          //'#parents' => array($rid, $code),

        );

      }

    }

/*    // Store $role_names for use when saving the data.

    $form['lang_dropdown']['hideout']['role_names'] = array(

      '#type' => 'value',

      '#value' => $role_names,

    );

    $form['lang_dropdown']['hideout']['languages'] = array(

      '#theme' => 'lang_dropdown_hiddenlanguages',

    );

    foreach ($languages as $code => $language) {

      $options[$code] = '';

      $form['lang_dropdown']['hideout']['languages']['language'][$code] = array(

        '#type' => 'item',

        '#markup' => $language->name,

      );

      foreach ($role_names as $rid => $role) {

        // Builds arrays for checked boxes for each role

        if (isset($this->configuration['hidden_languages'][$rid][$code])) {

          $status[$rid][] = $code;

        }

      }

    }

    // Have to build checkboxes here after checkbox arrays are built

    foreach ($role_names as $rid => $role) {

      $form['lang_dropdown']['hideout']['languages']['checkboxes'][$rid] = array(

        '#type' => 'checkboxes',

        '#options' => $options,

        '#default_value' => isset($status[$rid]) ? $status[$rid] : array(),

        '#attributes' => array('class' => array('rid-' . $rid)),

      );

      $form['lang_dropdown']['hideout']['languages']['role_names'][$rid] = array(

        '#markup' => String::checkPlain($role->label()),

        '#tree' => TRUE,

      );

    }*/

    return $form;

  }