code: @Override
      @SuppressWarnings("unchecked")
      public <I> Choice8<A, B, C, D, E, F, I, H> biMapL(Function<? super G, ? extends I> fn) {
          return (Choice8<A, B, C, D, E, F, I, H>) Bifunctor.super.biMapL(fn);
      }
docs: {@inheritDoc}