@Override
      public boolean done() {
        int count = getDeltaGIICount(P);
        return (count == 0);
      }
vm0 and vm1 are peers, each holds a DR. create some exception list. Then shutdown R. Before
GII, P's RVV is P7,R6(3-6), RVVGC is P0,R0; R's RVV is P3,R6, RVVGC is P0,R0 vm1 becomes
offline then restarts. Use testHook to pause the GII, then do tombstone GC at P only. The
deltaGII should send correct tombstonedelta to R, revoke unfinished opeation R4,R5

There's member T doing GII from P at the same time.

In this test, GII thread will get the GIILock before tombstone GC, so tombstone GC should wait
for all GIIs to finish
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/GIIDeltaDUnitTest.java