in lib/data_access/cache.ts [15:30]
constructor(settings?:DataCacheSettings<T>){
if (settings) {
DataCache.validateSettings<T>(settings);
this.time = settings.time || null; // milliseconds
this.obj = settings.max;
this.getter = settings.getter;
}
this._keys = [];
this._values = new Map<string, T>();
this._timeouts = {};
this._getObservable = {};
Object.seal(this);
}