@Override
  public CliFunctionResult executeFunction(FunctionContext<Object[]> context) throws Exception {
    final Object[] args = context.getArguments();
    if (args.length < 4) {
      throw new IllegalStateException(
          "Arguments length does not match required length. Import command may have been sent from incompatible older version");
    }
    final String regionName = (String) args[0];
    final String importFileName = (String) args[1];
    final boolean invokeCallbacks = (boolean) args[2];
    final boolean parallel = (boolean) args[3];

    CliFunctionResult result;
    final Cache cache =
        ((InternalCache) context.getCache()).getCacheForProcessingClientRequests();
    final Region<Object, Object> region = cache.getRegion(regionName);
    final String hostName = cache.getDistributedSystem().getDistributedMember().getHost();
    if (region != null) {
      RegionSnapshotService<Object, Object> snapshotService = region.getSnapshotService();
      SnapshotOptions<Object, Object> options = snapshotService.createOptions();
      options.invokeCallbacks(invokeCallbacks);
      options.setParallelMode(parallel);
      File importFile = new File(importFileName);
      snapshotService.load(new File(importFileName), SnapshotFormat.GEODE, options);
      String successMessage = CliStrings.format(CliStrings.IMPORT_DATA__SUCCESS__MESSAGE,
          importFile.getCanonicalPath(), hostName, regionName);
      result = new CliFunctionResult(context.getMemberName(), CliFunctionResult.StatusState.OK,
          successMessage);
    } else {
      result = new CliFunctionResult(context.getMemberName(), CliFunctionResult.StatusState.ERROR,
          CliStrings.format(CliStrings.REGION_NOT_FOUND, regionName));
    }

    return result;
  }
*
Function which carries out the import of a region to a file on a member. Uses the
RegionSnapshotService to import the data
geode-gfsh/src/main/java/org/apache/geode/management/internal/cli/functions/ImportDataFunction.java