Method add

core/src/com/google/inject/internal/WeakKeySet.java:79–99

(Key<?> key, InjectorBindingData state, Object source)

  }

  public void add(Key<?> key, InjectorBindingData state, Object source) {
    if (backingMap == null) {
      backingMap = Maps.newHashMap();
    }
    // if it's an instanceof Class, it was a JIT binding, which we don't
    // want to retain.
    if (source instanceof Class || source == SourceProvider.UNKNOWN_SOURCE) {
      source = null;
    }
    Object convertedSource = Errors.convert(source);
    backingMap.computeIfAbsent(key, k -> LinkedHashMultiset.create()).add(convertedSource);

    // Avoid all the extra work if we can.
    if (state.parent().isPresent()) {
      Set<KeyAndSource> keyAndSources = evictionCache.getIfPresent(state);
      if (keyAndSources == null) {
        evictionCache.put(state, keyAndSources = Sets.newHashSet());
      }
      keyAndSources.add(new KeyAndSource(key, convertedSource));
    }
  }

  public boolean contains(Key<?> key) {
    evictionCache.cleanUp();