void removeFromBaseRegionToCqNameMap(String regionName, String cqName) {
    synchronized (baseRegionToCqNameMap) {
      ArrayList<String> cqs = baseRegionToCqNameMap.get(regionName);
      if (cqs != null) {
        cqs.remove(cqName);
        if (cqs.isEmpty()) {
          baseRegionToCqNameMap.remove(regionName);
        } else {
          baseRegionToCqNameMap.put(regionName, cqs);
        }
      }
    }
  }
Manages the CQs created for the base region. This is managed here, instead of on the base
region; since the cq could be created on the base region, before base region is created (using
newCq()).
geode-cq/src/main/java/org/apache/geode/cache/query/cq/internal/CqServiceImpl.java