private boolean isThisSenderAttached(PartitionedRegion pr) {
    return pr.getParallelGatewaySenderIds()
        .contains(getPartitionedRegion().getParallelGatewaySender().getId());
  }
Return all of the user PR buckets for this bucket region queue.
geode-core/src/main/java/org/apache/geode/internal/cache/AbstractBucketRegionQueue.java