public String modifyRegion(String regName, String lruOption, String lruActionOption,
      String lruLimitOption, String concurrencyLevelOption, String initialCapacityOption,
      String loadFactorOption, String compressorClassNameOption, String statisticsEnabledOption,
      String offHeapOption, boolean printToConsole) {
    assert isOffline();
    DiskRegionView drv = getDiskInitFile().getDiskRegionByName(regName);
    if (drv == null) {
      drv = getDiskInitFile().getDiskRegionByPrName(regName);
      if (drv == null) {
        throw new IllegalArgumentException(
            "The disk store does not contain a region named: " + regName);
      } else {
        return getDiskInitFile().modifyPRRegion(regName, lruOption, lruActionOption, lruLimitOption,
            concurrencyLevelOption, initialCapacityOption, loadFactorOption,
            compressorClassNameOption, statisticsEnabledOption, offHeapOption, printToConsole);
      }
    } else {
      return getDiskInitFile().modifyRegion(drv, lruOption, lruActionOption, lruLimitOption,
          concurrencyLevelOption, initialCapacityOption, loadFactorOption,
          compressorClassNameOption, statisticsEnabledOption, offHeapOption, printToConsole);
    }
  }
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