in src/main/java/com/twitter/http2/HttpConnection.java [152:160]
int updateSendWindowSize(int streamId, int deltaWindowSize) {
if (streamId == HTTP_CONNECTION_STREAM_ID) {
return sendWindowSize.addAndGet(deltaWindowSize);
}
Node stream = streams.get(streamId);
StreamState state = stream == null ? null : stream.state;
return state != null ? state.updateSendWindowSize(deltaWindowSize) : -1;
}