public void destroyRegion(String regName) {
    DiskRegionView drv = getDiskInitFile().getDiskRegionByName(regName);
    if (drv == null) {
      drv = getDiskInitFile().getDiskRegionByPrName(regName);
      PRPersistentConfig prConfig = getDiskInitFile().getPersistentPR(regName);
      if (drv == null && prConfig == null) {
        throw new IllegalArgumentException(
            "The disk store does not contain a region named: " + regName);
      } else {
        getDiskInitFile().destroyPRRegion(regName);
      }
    } else {
      getDiskInitFile().endDestroyRegion(drv);
    }
  }
Destroy a region which has not been created.

@param regName the name of the region to destroy
geode-core/src/main/java/org/apache/geode/internal/cache/DiskStoreImpl.java