public void TestRemoveAllFromList() {
      ParseObject obj = new ParseObject("Corgi");
      obj["existingList"] = new List<string>() { "gogo", "Queen of Pain" };

      obj.RemoveAllFromList("existingList", new List<string>() { "gogo", "missingItem" });
      Assert.AreEqual(1, obj.Get<List<object>>("existingList").Count);
    }