Method weakKeys

corpus/java/training/guava/collect/MapMaker.java:205–209

Specifies that each key (not value) stored in the map should be wrapped in a WeakReference (by default, strong references are used). Warning: when this method is used, the resulting map will use identity (==) comparison to determine equality of keys, which is a technical v

()

   * @see WeakReference
   */
  @CanIgnoreReturnValue
  @GwtIncompatible // java.lang.ref.WeakReference
  public MapMaker weakKeys() {
    return setKeyStrength(Strength.WEAK);
  }

  MapMaker setKeyStrength(Strength strength) {
    checkState(keyStrength == null, "Key strength was already set to %s", keyStrength);