kibana-123/src/ui/public/index_patterns/_pattern_cache.js

Kibana is an open source (Apache Licensed), browser based analytics and search dashboard for Elasticsearch. Kibana is a snap to setup and start using. Kibana strives to be easy to get started with, while also being flexible and powerful, just like Elastic

import _ from 'lodash';
export default function PatternCache() {

  let vals = {};

  let validId = function (id) {
    return typeof id !== 'object';
  };

  this.get = function (id) {
    if (validId(id)) return vals[id];
  };

  this.set = function (id, prom) {
    if (validId(id)) vals[id] = prom;
    return prom;
  };

  this.clear = this.delete = function (id) {
    if (validId(id)) delete vals[id];
  };
};