code: protected final void skip(Object source, Object destination) {
      assertBuilder();
      builder.skip(source, destination);
    }
docs: Specifies that mapping from the {@code source} to the {@code destination} be skipped during the
  mapping process. See the EDSL examples at {@link PropertyMap}. See the <a href="#3">EDSL
  examples</a>.
  
  @param source to skip
  @param destination to skip
  @throws IllegalStateException if called from outside the context of
  {@link PropertyMap#configure()}.