/**
* Get the worker associated with the given scope, or null.
*
* @return the worker associated with the current thread, or null.
*/
public RingoWorker getCurrentWorker() {
return currentWorker.get();
}
/**
* Associate a worker with the current worker and return the worker that was previously associated
* with it, or null.
*
* @param worker the new worker associated with the current thread
* @return the worker previously associated with the current thread, or null
*/
protected RingoWorker setCurrentWorker(RingoWorker worker) {
RingoWorker previousWorker = currentWorker.get();
currentWorker.set(worker);
return previousWorker;
}