in src/main/java/com/twitter/http2/HttpConnection.java [226:240]
PendingWrite getPendingWrite(Node node) {
PendingWrite e = null;
if (node.state != null && node.state.getSendWindowSize() > 0) {
e = node.state.getPendingWrite();
}
if (e == null) {
for (Node child : node.children) {
e = getPendingWrite(child);
if (e != null) {
break;
}
}
}
return e;
}