code: function defaultWorkerPolicies(version, workspaceSid, workerSid) {
    var activities = new Policy({
      url: _.join([TASKROUTER_BASE_URL, version, 'Workspaces', workspaceSid, 'Activities'], '/'),
      method: 'GET',
      allow: true
    });
    var tasks = new Policy({
      url: _.join([TASKROUTER_BASE_URL, version, 'Workspaces', workspaceSid, 'Tasks', '**'], '/'),
      method: 'GET',
      allow: true
    });
    var reservations = new Policy({
      url: _.join(
        [TASKROUTER_BASE_URL, version, 'Workspaces', workspaceSid, 'Workers', workerSid, 'Reservations', '**'],
        '/'
      ),
      method: 'GET',
      allow: true
    });
    var workerFetch = new Policy({
      url: _.join([TASKROUTER_BASE_URL, version, 'Workspaces', workspaceSid, 'Workers', workerSid], '/'),
      method: 'GET',
      allow: true
    });
  
    return [activities, tasks, reservations, workerFetch];
  }
docs: Build the default Policies for a worker
  
  @param {string} version TaskRouter version
  @param {string} workspaceSid workspace sid
  @param {string} workerSid worker sid
  @returns {Array<Policy>} list of Policies