for(MasterCompletionCallBack<MASTER_RESULT, WORKER_RESULT> callBack: context.getCallBackList()) { try { callBack.callback(context); } catch (Exception e) {
for(MasterCompletionCallBack<MASTER_RESULT, WORKER_RESULT> callBack: context.getCallBackList()) { try { callBack.callback(context); } catch (Exception e) {