Method subMap

corpus/java/training/guava/collect/Maps.java:953–957

(
        K fromKey, boolean fromInclusive, K toKey, boolean toInclusive)

    }

    @Override
    public NavigableMap<K, V> subMap(
        K fromKey, boolean fromInclusive, K toKey, boolean toInclusive) {
      return asMap(set.subSet(fromKey, fromInclusive, toKey, toInclusive), function);
    }

    @Override
    public NavigableMap<K, V> headMap(K toKey, boolean inclusive) {