public interface GroupSelectorSupportingProhibitedGroups extends GroupSelector {

  /**
   * Processes the Mobile Node´s prohibited group membership using the Context Update (CxtU) message
   * 
   * @param nodeMessage Context Update (CxtU) message produced by Mobile Node
   * @return A set that holds the Mobile Node´s group membership
   */
  public Set<Integer> processProhibitedGroups(Message nodeMessage);

  /**
   * Tests if a group is a prohibited group
   * 
   * @param groupId
   * @return Return if a group is a prohibited group or not
   */
  public boolean isProhibitedGroup(int groupId);
}