code: @Nonnull
  	public static <T, R> LObjDblFunction<T, R> objDblFunctionFrom(Consumer<LObjDblFunctionBuilder<T, R>> buildingFunction) {
  		LObjDblFunctionBuilder builder = new LObjDblFunctionBuilder();
  		buildingFunction.accept(builder);
  		return builder.build();
  	}
docs: One of ways of creating builder. This is possibly the least verbose way where compiler should be able to guess the generic parameters.