* * @param id * @param type * @param jobParams * @param options * @return {Promise<any>}

* Executes the next job in queue iff * they haven't expired and concurrency * limit is not already achieved.

* Remove "ready" jobs from the queue that have * lived past their max age. Removed jobs have * their failure listeners notified of the same.

* Set a function (async or sync) that * executes the jobs sent to the queue. * The handler will be passed a params object. * @param jobType

* Increments the priorites of "ready" jobs * in the queue to prevent starvation of lower * priority jobs.

* Get the next "ready" job from the queue * to be executed. The next ready job depends on - * 1) Priority: higher priority always executes first

* Given a package string * this function resolves to a valid version and name.