src/server/pkg/watch/watch.go
func CheckType(template proto.Message, val interface{}) error {
	if template != nil {
		valType, templateType := reflect.TypeOf(val), reflect.TypeOf(template)
		if valType != templateType {
			return fmt.Errorf("invalid type, got: %s, expected: %s", valType, templateType)
		}
	}
	return nil
}
func CheckType(template proto.Message, val interface{}) error {
	if template != nil {
		valType, templateType := reflect.TypeOf(val), reflect.TypeOf(template)
		if valType != templateType {
			return fmt.Errorf("invalid type, got: %s, expected: %s", valType, templateType)
		}
	}
	return nil
}
// CheckType checks to make sure val has the same type as template, unless
// template is nil in which case it always returns nil.