func WithExpiration(d time.Duration) Option {
	return func(o *Options) {
		o.exp = d
	}
}
// WithExpiration sets the custom cache expiration duration.
WithExpiration sets the custom cache expiration duration.
// WithExpiration sets the custom cache expiration duration .
func WithExpiration(d time.Duration) Option {
	return func(o *Options) {
		o.exp = d
	}
}
func WithExpiration ( d time . Duration ) Option { return func ( o * Options ) { o . exp = d } }
WithExpiration sets the custom cache expiration duration.
WithExpiration sets the custom cache expiration duration .