code: @Nonnull
    public EChange renameRole (@Nullable final String sRoleID, @Nonnull @Nonempty final String sNewName)
    {
      // Resolve user group
      final Role aRole = getOfID (sRoleID);
      if (aRole == null)
      {
        AuditHelper.onAuditModifyFailure (Role.OT, sRoleID, "no-such-id");
        return EChange.UNCHANGED;
      }
  
      m_aRWLock.writeLock ().lock ();
      try
      {
        if (aRole.setName (sNewName).isUnchanged ())
          return EChange.UNCHANGED;
  
        BusinessObjectHelper.setLastModificationNow (aRole);
        internalUpdateItem (aRole);
      }
      finally
      {
        m_aRWLock.writeLock ().unlock ();
      }
      AuditHelper.onAuditModifySuccess (Role.OT, "name", sRoleID, sNewName);
  
      // Execute callback as the very last action
      m_aCallbacks.forEach (aCB -> aCB.onRoleRenamed (aRole));
  
      return EChange.CHANGED;
    }
docs: Rename the role with the passed ID
  
  @param sRoleID
  The ID of the role to be renamed. May be <code>null</code>.
  @param sNewName
  The new name of the role. May neither be <code>null</code> nor
  empty.
  @return {@link EChange#CHANGED} if the passed role ID was found, and the
  new name is different from the old name of he role