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
	}
}
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.
OptFieldTypeMutex adds a mutex field .