code: @Override
      protected void _acceptTimestampVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
              throws JsonMappingException
      {
          JsonIntegerFormatVisitor v2 = visitor.expectIntegerFormat(typeHint);
          if (v2 != null) {
              v2.numberType(JsonParser.NumberType.LONG);
          }
      }
docs: Override because we have String/Int, NOT String/Array