code: function tasksUrl(workspaceSid, taskSid) {
    return _.join(
      _.filter([workspacesUrl(workspaceSid), 'Tasks', taskSid], _.isString),
      '/'
    );
  }
docs: Generate TaskRouter task url
  
  @param {string} workspaceSid workspace sid
  @param {string} [taskSid] task sid or '**' for all tasks
  @returns {string} generated url