private void printEvent(String name) {
    long nowNanos = System.nanoTime();
    if (name.equals("callStart")) {
      callStartNanos = nowNanos;
    }
    long elapsedNanos = nowNanos - callStartNanos;
    System.out.printf("%.3f %s%n", elapsedNanos / 1000000000d, name);
  }

  @Override public void callStart(Call call) {
    printEvent("callStart");
  }

  @Override public void callEnd(Call call) {

      assertFailsWith<IOException> {
        bodySource.readByte()
      }.also { expected ->
        // Timed out as expected.
        val elapsedNanos = System.nanoTime() - startNanos
        val elapsedMillis = TimeUnit.NANOSECONDS.toMillis(elapsedNanos)
        assertThat(elapsedMillis).isLessThan(500)
      }
    }
  }

  /** https://github.com/square/okhttp/issues/442  */
  @Test

        }
        statsCounter.recordLoadSuccess(loadingValueReference.elapsedNanos());
        storeLoadedValue(key, hash, loadingValueReference, value);
        return value;
      } finally {
        if (value == null) {
          statsCounter.recordLoadException(loadingValueReference.elapsedNanos());
          removeLoadingValue(key, hash, loadingValueReference);
        }
      }
    }

        }
        statsCounter.recordLoadSuccess(loadingValueReference.elapsedNanos());
        storeLoadedValue(key, hash, loadingValueReference, value);
        return value;
      } finally {
        if (value == null) {
          statsCounter.recordLoadException(loadingValueReference.elapsedNanos());
          removeLoadingValue(key, hash, loadingValueReference);
        }
      }
    }