code: public static <I, O> JMProcessor<I, O> build(
              Function<I, O> transformerFunction) {
          return new JMProcessor<>(transformerFunction);
      }
docs: Build jm processor.
  
  @param <I>                 the type parameter
  @param <O>                 the type parameter
  @param transformerFunction the transformer function
  @return the jm processor