field_group_tests.module

<?php
/**
 * @file
 * Field Group tests module.
 */

/**
 * Implements hook_field_access().
 */
function field_group_tests_field_access($op, $field, $entity_type, $entity, $account) {
  // Set access to false for field_no_access.
  if ($op == 'view' && $field['field_name'] == 'field_no_access') {
    return FALSE;
  }
}