Method tailMap

guava/src/com/google/common/collect/Maps.java:991–994

(@ParametricNullness K fromKey)

    }

    @Override
    public SortedMap<K, V> tailMap(@ParametricNullness K fromKey) {
      return asMap(backingSet().tailSet(fromKey), function);
    }

    @Override
    @ParametricNullness