/guava/guava/src/com/google/common/util/concurrent/SequentialExecutor.java
oldRunCount ;
oldRunCount = workerRunCount;
long oldRunCount; synchronized (queue) { if (workerRunningState == RUNNING || workerRunningState == QUEUED) { queue.add(task); return; } <extra_id_0> submittedTask = new Runnable() { @Override public void run() { task.run(); }