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This is essentially a wrapper of a Map */ export class MemoryStorageProvider<TKey, TValue> implements IStorageProvider<TKey, TValue> { private readonly data = new Map<TKey, IAgedValue<TValue>>();   readonly isPersistable = false;   /** * @param key The key to retrieve * @returns The value if retreiving was successful or null */ get(key: TKey): Promise<IAgedValue<TValue> | null> { const value = this.data.get(key); return Promise.resolve(value ?? null); }   /** * @param key The key to set * @param value The value to set * @returns The value written if successful or null */ set(key: TKey, agedValue: IAgedValue<TValue>): Promise<IAgedValue<TValue> | null> { this.data.set(key, agedValue); return Promise.resolve(agedValue); }   /** * @param key The key to the value to delete * @returns The value deleted or boolean (value | true is success). A provider * is not required to return a value */ delete(key: TKey): Promise<IAgedValue<TValue> | boolean> { const kv = this.data.get(key); return Promise.resolve(this.data.delete(key) ? (kv as IAgedValue<TValue>) : <span class="branch-1 cbranch-no" title="branch not covered" >false)</span>; }   /** * @returns The keys that are currently available in the provider */ keys(): Promise<TKey[]> { const keys = Array.from(this.data.keys()); return Promise.resolve(keys); }   /** * @returns The number of elements in this storage system */ size(): Promise<number> { return Promise.resolve(this.data.size); } }  </pre></td></tr></table></pre> <div class='push'></div> </div> <div class='footer quiet pad2 space-top1 center small'> Code coverage generated by <a href="https://istanbul.js.org/" target="_blank" rel="noopener">istanbul</a> at Sat Dec 11 2021 15:35:52 GMT-0600 (Central Standard Time) </div> </div> <script src="../../prettify.js"></script> <script> window.onload = function () { prettyPrint(); }; </script> <script src="../../sorter.js"></script> <script src="../../block-navigation.js"></script> </body> </html>