}


    @Override
    public SmbWatchHandle watch ( int filter, boolean recursive ) throws CIFSException {

        if ( filter == 0 ) {
            throw new IllegalArgumentException("filter must not be 0");
        }

        if ( !isDirectory() ) {
            throw new SmbException("Is not a directory");
        }

      return new MapMakerInternalMap<>(builder, WeakKeyDummyValueEntry.Helper.<K>instance());
    }
    if (builder.getValueStrength() == Strength.WEAK) {
      throw new IllegalArgumentException("Map cannot have both weak and dummy values");
    }
    throw new AssertionError();
  }

  enum Strength {
    STRONG {
      @Override
      Equivalence<Object> defaultEquivalence() {

     */
    protected void assertPropertyNotNull(String property) {
        if (property == null) {
            String msg = "The argument 'property' for message should not be null.";
            throw new IllegalArgumentException(msg);
        }
    }