protected void deletePermissions(final List<TenantPermission> tenantPermissions) {
    for (final TenantPermission tenantPermissionAux : tenantPermissions) {
      final TenantPermission tenantPermission = tenantPermissionService.find(tenantPermissionAux);
      if (tenantPermission != null) {
        tenantPermissionService.delete(tenantPermission);