docs: boolean initialOutboundWindowSize(int newWindowSize) {
      if (newWindowSize < 0) {
        throw new IllegalArgumentException("Invalid initial window size: " + newWindowSize);
      }
  
      int delta = newWindowSize - initialWindowSize;
      initialWindowSize = newWindowSize;
      for (OkHttpClientStream stream : transport.getActiveStreams()) {
        OutboundFlowState state = (OutboundFlowState) stream.getOutboundFlowState();
        if (state == null) {
          // Create the OutboundFlowState with the new window size.
          state = new OutboundFlowState(stream, initialWindowSize);
          stream.setOutboundFlowState(state);
        } else {
          state.incrementStreamWindow(delta);
        }
      }
  
      return delta > 0;
    }