public static URepeated create(CharSequence identifier, UExpression expression) {
    return new AutoValue_URepeated(identifier.toString(), expression);
  }
@Test
  public void equality() {
    new EqualsTester()
        .addEqualityGroup(URepeated.create("foo", UFreeIdent.create("foo")))
        .addEqualityGroup(URepeated.create("bar", UFreeIdent.create("bar")))
        .testEquals();
  }