public static void startCache() {
    try {
      if (cache.isClosed()) {
        cache = CacheFactory.create(ds);
      }
    } catch (Exception e) {
      LogWriterUtils.getLogWriter().warning("exception while creating cache", e);
    }
  }
Return file as string and then modify the string accordingly **
geode-core/src/distributedTest/java/org/apache/geode/internal/jta/dunit/TxnManagerMultiThreadDUnitTest.java