private void sendAbort(DistributedMember member, int flowId) {
      FlowController.getInstance().sendAbort(region.getDistributionManager(), flowId, member);
    }
Aborts any further collection of results and forwards the cancellation to the members
involved in the export.
geode-core/src/main/java/org/apache/geode/internal/cache/snapshot/WindowedExporter.java