cache

type Cache interface {
	// Put stores the given (key,value) pair, replacing existing value if
	// key already exists.
	Put(key interface{}, value Value) error
	// Get returns the value for a given key.
	Get(key interface{}) (Value, error)
	// Len returns number of elements in the cache.
	Len() int
}

type CacheableBlock struct {
	*util.Block
}

type CacheableFilter struct {
	*gcs.Filter
}

type Value interface {
	// Size determines how big this entry would be in the cache. For
	// example, for a filter, it could be the size of the filter in bytes.
	Size() (uint64, error)
}