private V load(K key) throws ExecutionException {
    long startTime = ticker.read();
    V calculatedValue;
    try {
      calculatedValue = checkNotNull(loader).load(key);
      // TODO(b/147136275): Perform the null check on the result before the put() call.
      put(key, calculatedValue);
    } catch (RuntimeException e) {
      statsCounter.recordLoadException(ticker.read() - startTime);