| helpers.js | Request a lock and hold it until the subtest ends.
 @param {*} t test runner object
 @param {string} name lock name
 @param {LockOptions=} options lock options
 @returns | 3468 | 
        
          | iframe-parent.html | Helper IFrame | 1201 | 
        
          | iframe.html | Helper IFrame | 1411 | 
        
          | parentworker.js |  | 330 | 
        
          | partitioned-parent.html |  | 969 | 
        
          | service-worker.js |  | 244 | 
        
          | sw-controlled-iframe.html | iframe used in clientId test | 1167 | 
        
          | worker.js |  | 1408 |