code: public void incrementConnectionWindowUpdateLimit(int x) throws FlowControlException {
          if (!checkIfGoAwaySendingOrClosing()) {
              writeQ.incrementConnectionWindowUpdateLimit(x);
              H2StreamProcessor stream;
              for (Integer i : streamTable.keySet()) {
                  stream = streamTable.get(i);
                  if (stream != null) {
                      stream.connectionWindowSizeUpdated();
                  }
              }
          }
      }
docs: Increment the connection window limit but the given amount
  
  @param int amount to increment connection window
  @throws FlowControlException