code: public static <T> Optional<T> fromGuavaOptional(final com.google.common.base.Optional<T> guavaOptional) {
          return Optional.ofNullable(guavaOptional.orNull());
      }
docs: Convert a Guava {@link com.google.common.base.Optional} to an {@link Optional}.
  
  @param guavaOptional The Guava {@link com.google.common.base.Optional}
  @return An equivalent {@link Optional}