Checks data value access.
@todo Don't depend on module level code.
string $operation: (optional) The operation to be performed. Supported values are:
Defaults to 'view'.
Drupal\Core\Session\AccountInterface $account: (optional) The user for which to check access, or NULL to check access for the current user. Defaults to NULL.
bool TRUE if the given user has access for the given operation, FALSE otherwise.
public function access($operation = 'view', AccountInterface $account = NULL);