@Override
	public double degree(Vertex v) {
		return inDegree(v) + outDegree(v) - selfDegree(v);
	}
Returns the weighted degree of this vertex. The degree is the
sum of weights of all edges entering and leaving this vertex.
Ghidra/Framework/Generic/src/main/java/ghidra/util/graph/WeightedDigraph.java