private File archiveFile(final String name, final int mainId, final int childId) {
    return new File(dir, archiveName(name, mainId, childId) + ".gfs");
  }
Validates number of files under this.dir while ignoring this.dirOfDeletedFiles.
geode-core/src/integrationTest/java/org/apache/geode/internal/statistics/DiskSpaceLimitIntegrationTest.java