func (c *cache) Flush() {
	c.mu.Lock()
	c.items = map[string]Item{}
	c.mu.Unlock()
}
func (c *cache) Flush() {
	c.mu.Lock()
	c.items = map[string]Item{}
	c.mu.Unlock()
}
func ( c * cache ) Flush ( ) { c . mu . Lock ( ) c . items = map [ string ] Item { } c . mu . Unlock ( ) }
// Delete all items from the cache.
Delete all items from the cache .