orm.go
func OptFieldTypeMutex(cacheType CacheType, cacheSize int) FieldOption {
	return func(options *FieldOptions) {
		options.fieldType = FieldTypeMutex
		options.cacheType = cacheType
		options.cacheSize = cacheSize
	}
}
func OptFieldTypeMutex(cacheType CacheType, cacheSize int) FieldOption {
	return func(options *FieldOptions) {
		options.fieldType = FieldTypeMutex
		options.cacheType = cacheType
		options.cacheSize = cacheSize
	}
}
// OptFieldTypeMutex adds a mutex field.