public final boolean isInitialized() {
      byte isInitialized = memoizedIsInitialized;
      if (isInitialized != -1) return isInitialized == 1;
      
      if (!hasId()) {
        memoizedIsInitialized = 0;
        return false;
      }
      if (!hasDuration()) {
        memoizedIsInitialized = 0;
        return false;
      }
      if (!hasRepeats()) {
        memoizedIsInitialized = 0;
        return false;
      }
      memoizedIsInitialized = 1;
      return true;
    }