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      synchronized (sProcessingWork) {
            LinkedList<Runnable> work;

            synchronized (sLock) {
                work = sWork;
                sWork = new LinkedList<>();

                // Remove all msg-s as all work will be processed now
                getHandler().removeMessages(QueuedWorkHandler.MSG_RUN);
            }
            // 在work.size之前，如果其他线程又有数据向添加sWork ，Android12 work.size()重新设置代理，
            是不是添加到的sWork数据会丢失？work.size()可不在sLock下执行。

            if (work.size() > 0) {
                for (Runnable w : work) {
                    w.run();
                }

                if (DEBUG) {
                    Log.d(LOG_TAG, "processing " + work.size() + " items took " +
                            +(System.currentTimeMillis() - startTime) + " ms");
                }
            }
        }