public static UArrayTypeTree create(UExpression elementType) {
    return new AutoValue_UArrayTypeTree(elementType);
  }
@Test
  public void equality() {
    new EqualsTester()
        .addEqualityGroup(UArrayTypeTree.create(UPrimitiveTypeTree.INT))
        .addEqualityGroup(UArrayTypeTree.create(UClassIdent.create("java.lang.String")))
        .addEqualityGroup(UArrayTypeTree.create(UArrayTypeTree.create(UPrimitiveTypeTree.INT)))
        .testEquals();
  }