code: public static Identity createOverlayManagerGroup(String name) {
  		return ExtendedIdentifiers.createExtendedIdentifier(IfmapStrings.ICS_METADATA_NS_URI,
  				IfmapStrings.ICS_METADATA_PREFIX, "overlay-manager-group", name);
  	}
docs: Create a overlay-manager-group identifier,
  that is an extended identity identifier.
  
  @param name
  name of a particular Overlay Manager group
  @return the new {@link Identity} instance