if clear {
				fieldValue = reflect.MakeSlice(oldFieldValue.Type(), 0, oldFieldValue.Cap())
			} else {
				fieldValue = reflect.MakeSlice(oldFieldValue.Type(), oldFieldValue.Len(), oldFieldValue.Cap())
				reflect.Copy(fieldValue, oldFieldValue)
			}

			appendToFieldValues := func(ev reflect.Value) {
				if ev.Type().AssignableTo(elemType) {
					fieldValue = reflect.Append(fieldValue, ev)