public List<CacheElement> getCustomRegionElements() {
    if (regionElements == null) {
      regionElements = new ArrayList<>();
    }
    return regionElements;
  }
Gets the list of custom region elements
Currently, users can not create regions with custom region elements using management v2 api.
this cache element list will be ignored when creating the region

@return the list of custom region elements
geode-core/src/main/java/org/apache/geode/cache/configuration/RegionConfig.java