in src/main/java/com/twitter/http2/HttpConnection.java [391:402]
public void addDependent(boolean exclusive, Node node) {
removeDependent(node);
if (exclusive) {
for (Node child : children) {
node.addDependent(false, child);
}
children.clear();
dependentWeights = 0;
}
children.add(node);
dependentWeights += node.weight;
}