gistfile1.txt

  if (module_exists('commons_search_solr_user')) {
    $field_instances['user-user-group_group']['view modes']['search_results'] = array(
      'label' => 'hidden',
      'module' => 'commons_trusted_contacts',
      'custom settings' => TRUE,
      'type' => 'trusted_contact',
    );
  }