Function.prototype.apply.apply - setTimeout

Question

Jasmine里的代码，这个Function.prototype.apply.apply 里这个SetTimeout方法

if (queueableFn.timeout) {
    timeoutId = Function.prototype.apply.apply(self.timeout.setTimeout, [j$.getGlobal(), [function() {
      var error = new Error('Timeout - Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL.');
      onException(error);
      next();
    }, queueableFn.timeout()]]);
}

有人知道这段写法的意思吗？？？