grpc-gcp-benchmarks/src/benchmarkTest/java/SpannerClientV1TestCases.java [282:305]:
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    t.start();

    System.out.println("I'm sleeping and will wake up after 2000ms zzzZZZZ.");
    Thread.sleep(2000);
    System.out.println("Good morning!");

    // Free one call.
    while (responses.get(0).hasNext()) {
      responses.get(0).next();
    }
    System.out.println(
        String.format("Freed one call in %dms.", System.currentTimeMillis() - start));

    // Free all the calls.
    for (int i = 1; i < responses.size(); i++) {
      Iterator<PartialResultSet> iter = responses.get(i);
      while (iter.hasNext()) {
        iter.next();
      }
    }
    System.out.println(
        String.format("Freed %d call(s) in %dms.", numOfRpcs, System.currentTimeMillis() - start));

    t.join();
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grpc-gcp-benchmarks/src/benchmarkTest/java/SpannerTestCases.java [421:444]:
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    t.start();

    System.out.println("I'm sleeping and will wake up after 2000ms zzzZZZZ.");
    Thread.sleep(2000);
    System.out.println("Good morning!");

    // Free one call.
    while (responses.get(0).hasNext()) {
      responses.get(0).next();
    }
    System.out.println(
        String.format("Freed one call in %dms.", System.currentTimeMillis() - start));

    // Free all the calls.
    for (int i = 1; i < responses.size(); i++) {
      Iterator<PartialResultSet> iter = responses.get(i);
      while (iter.hasNext()) {
        iter.next();
      }
    }
    System.out.println(
        String.format("Freed %d call(s) in %dms.", numOfRpcs, System.currentTimeMillis() - start));

    t.join();
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