public FloatSortedSet keySet() { if (keys == null) keys = FloatSortedSets.synchronize(sortedMap.keySet(), sync); return (FloatSortedSet) keys; }
public FloatSortedSet keySet() { if (keys == null) keys = FloatSortedSets.unmodifiable(sortedMap.keySet()); return (FloatSortedSet) keys; }
public FloatSortedSet keySet() { if (keys == null) keys = FloatSortedSets.singleton(key, comparator); return (FloatSortedSet) keys; }