public static void unregisterProtocol(final String id){
  if (id == null) {
    throw new IllegalArgumentException("id is null");
  }
  PROTOCOLS.remove(id);
}

public static void unregisterProtocol ( final String id ) { if ( id == null ) { throw new IllegalArgumentException ( "id is null" ) ; } PROTOCOLS . remove ( id ) ; }
unregisters the protocol with the given id .
