@J2ktIncompatible
    @GwtIncompatible
        Object writeReplace() {
      return super.writeReplace();
    }
  }

  @Override
  public boolean equals(@Nullable Object obj) {
    return Lists.equalsImpl(this, obj);
  }

  @Override
  public int hashCode() {
    int hashCode = 1;
    int n = size();
    for (int i = 0; i < n; i++) {
      hashCode = 31 * hashCode + get(i).hashCode();

    @GwtIncompatible
        Object writeReplace() {
      return super.writeReplace();
    }
  }

  @Override
  public boolean equals(@Nullable Object object) {
    return Maps.equalsImpl(this, object);
  }

  abstract boolean isPartialView();

  @Override
  public int hashCode() {
    return Sets.hashCodeImpl(entrySet());
  }

  boolean isHashCodeFast() {

    @GwtIncompatible
        Object writeReplace() {
      return super.writeReplace();
    }
  }

  @Override
  public boolean equals(@Nullable Object object) {
    return Maps.equalsImpl(this, object);
  }

  abstract boolean isPartialView();

  @Override
  public int hashCode() {
    return Sets.hashCodeImpl(entrySet());
  }

  boolean isHashCodeFast() {

      }
    }

    @Override
    public boolean equals(@Nullable Object o) {
      if (o == this) {
        return true;
      }
      synchronized (mutex) {
        return Sets.equalsImpl(delegate(), o);
      }
    }

    @Override
    public boolean remove(@Nullable Object o) {
      synchronized (mutex) {
        return Maps.removeEntryImpl(delegate(), o);
      }
    }

      }
    }

    @Override
    public boolean equals(@Nullable Object o) {
      if (o == this) {
        return true;
      }
      synchronized (mutex) {
        return Sets.equalsImpl(delegate(), o);
      }
    }

    @Override
    public boolean remove(@Nullable Object o) {
      synchronized (mutex) {
        return Maps.removeEntryImpl(delegate(), o);
      }
    }