/* 127 */ public LongSet keySet() {
if (this.keys == null) this.keys = LongSets.singleton(this.key);
return this.keys;
}
/* 295 */ public LongSet keySet() {
if (this.keys == null) this.keys = LongSets.unmodifiable(this.map.keySet());
return this.keys;
}
/* 241 */ public LongSet keySet() {
if (this.keys == null) this.keys = LongSets.synchronize(this.map.keySet(), this.sync);
return this.keys;
}