Method lowerEntry

guava/src/com/google/common/collect/Maps.java:4281–4284

(@ParametricNullness K key)

    }

    @Override
    public @Nullable Entry<K, V> lowerEntry(@ParametricNullness K key) {
      return forward().higherEntry(key);
    }

    @Override
    public @Nullable K lowerKey(@ParametricNullness K key) {