// guaranteed to be called only once.
func (t *Cache[T]) InitOnce(ttl time.Duration, opts Opts, update func() (T, error)) {
	t.Once.Do(func() {
		t.ttl = ttl
		t.updateFn = update
		t.opts = opts
	})
}

// Get will return a cached value or fetch a new one.
// Tf the Update function returns an error the value is forwarded as is and not cached.
func (t *Cache[T]) Get() (T, error) {
	v := t.valErr.Load()

func (c *Config) Enabled() bool {
	return c.Enable && c.Endpoint != ""
}

// MatchesSize verifies if input 'size' falls under cacheable threshold
func (c Config) MatchesSize(size int64) bool {
	configLock.RLock()
	defer configLock.RUnlock()

	return c.Enable && c.BlockSize > 0 && size <= c.BlockSize
}

// Update updates new cache frequency
func (c *Config) Update(ncfg Config) {