public String toString() {
      return equivalence + ".equivalentTo(" + target + ")";
    }

    private static final long serialVersionUID = 0;
  }

  /**
   * Returns an equivalence that delegates to {@link Object#equals} and {@link Object#hashCode}.
   * {@link Equivalence#equivalent} returns {@code true} if both values are null, or if neither

    public String toString() {
      return equivalence + ".equivalentTo(" + target + ")";
    }

    private static final long serialVersionUID = 0;
  }

  /**
   * Returns an equivalence that delegates to {@link Object#equals} and {@link Object#hashCode}.
   * {@link Equivalence#equivalent} returns {@code true} if both values are null, or if neither