code: function (path, strategy) {
      if (typeof path !== 'string') {
        throw new Error('path should be a string');
      }
      if (!util.isFolder(path)) {
        throw new Error('path should be a folder');
      }
      if (this._remoteStorage && this._remoteStorage.access &&
          !this._remoteStorage.access.checkPathPermission(path, 'r')) {
        throw new Error('No access to path "'+path+'". You have to claim access to it first.');
      }
      if (!strategy.match(/^(FLUSH|SEEN|ALL)$/)) {
        throw new Error("strategy should be 'FLUSH', 'SEEN', or 'ALL'");
      }
  
      this._rootPaths[path] = strategy;
  
      if (strategy === 'ALL') {
        if (this.activateHandler) {
          this.activateHandler(path);
        } else {
          this.pendingActivations.push(path);
        }
      }
    }
docs: Configure caching for a given path explicitly.
  
  Not needed when using ``enable``/``disable``.
  
  @param {string} path - Path to cache
  @param {string} strategy - Caching strategy. One of 'ALL', 'SEEN', or 'FLUSH'.