code: protected AccessControlGroup group(String groupId, String... permissionIds) {
  
      return group(groupId, Collections.<AccessControlGroup> emptyList(), permissionIds);
    }
docs: Creates a new {@link AccessControlGroup} for static configuration of access controls.
  
  @param groupId {@link AccessControlGroup#getId() ID} of {@link AccessControlGroup} to create.
  @param permissionIds {@link AccessControlPermission#getId() ID}s of the {@link #permission(String) permissions} to
  {@link AccessControlGroup#getPermissions() use}.
  @return the newly created and registered {@link AccessControlGroup}.