views_views_handlers in includes/handlers.inc

Implementation of hook_views_handlers() to register all of the basic handlers views uses.

class views_handler_filter_broken extends views_handler_filter {
  function ui_name($short = FALSE) {
    return t('Broken/missing handler');
  }

  function ensure_my_table() { /* No table to ensure! */
  }
  function query() { /* No query to run */
  }
  function options_form(&$form, &$form_state) {
    $form['markup'] = array(
      '#prefix' => '<div class="form-item description">',
      '#value' => t('The handler for this item is broken or missing and cannot be used. If a module provided the handler and was disabled, re-enabling the module may restore it. Otherwise, you should probably delete this item.'),
    );
  }

  /**
   * Determine if the handler is considered 'broken'
   */
  function broken() {
    return TRUE;
  }
}