code: public static void init(Context contextValue, ExecutorService service) {
  		context = contextValue;
  
  		if (service == null) {
  			executerService = Executors.newFixedThreadPool(THREAD_POOL_SIZE_DEFAULT);
  		} else {
  			executerService = service;
  		}
  
  	}
docs: Method to invoke during application initialization.
  
  @param contextValue
  the context value
  @param executorService
  the executor service