Method constructor

src/Controllers/CacheController.js:16–20

(prefix, cacheController, ttl)

 */
export class SubCache {
  constructor(prefix, cacheController, ttl) {
    this.prefix = prefix;
    this.cache = cacheController;
    this.ttl = ttl;
  }

  get(key) {
    const cacheKey = joinKeys(this.prefix, key);