this.i = checkNotNull(i);
    }

    @Override
    public int hashCode() {
      return i.hashCode();
    }

    @Override
    @SuppressWarnings({"BoxedPrimitiveEquality", "NumericEquality"})
    public boolean equals(@Nullable Object obj) {
      if (obj instanceof SameIntegerInstance) {
        SameIntegerInstance that = (SameIntegerInstance) obj;
        return i == that.i;