private void invokeRemoteClearAndWait() {
    server1.invoke(() -> {
      Region region = getCache().getRegion(regionName);
      region.clear();
    });
  }
This method clears the region and notifies the other member when complete
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/ClearDuringGiiOplogWithMissingCreateRegressionTest.java