Queue build, start and stop

DownloadContext.Builder builder = new DownloadContext.QueueSet()
        .setParentPathFile(parentFile)
        .setMinIntervalMillisCallbackProcess(150)
        .commit();
builder.bind(url1);
builder.bind(url2).addTag(key, value);
builder.bind(url3).setTag(tag);
builder.setListener(contextListener);

DownloadTask task = new DownloadTask.Builder(url4, parentFile)
        .setPriority(10).build();
builder.bindSetTask(task);

DownloadContext context = builder.build();

context.startOnParallel(listener);

// stop
context.stop();