docs: public static <K, V> ImmutableListMultimap<K, V> loadMultimap(final File file,
        final Function<String, K> keyFunction, final Function<String, V> valueFunction)
        throws IOException {
      return loadMultimap(Files.asCharSource(file, Charsets.UTF_8), keyFunction, valueFunction,
          IsCommentLine.INSTANCE);
    }