code: private void setIncreasePaymentFutureIfNeeded(PaymentChannelCloseException.CloseReason reason, String message) {
          if (increasePaymentFuture != null && !increasePaymentFuture.isDone()) {
              increasePaymentFuture.setException(new PaymentChannelCloseException(message, reason));
          }
      }
docs: /*
  If this is an ongoing payment channel increase we need to call setException() on its future.
  
  @param reason is the reason for aborting
  @param message is the detailed message