private static void incrementWeightProperty(AttributedEdge edge) {
		if (edge.hasAttribute(WEIGHT)) {
			String weightString = edge.getAttribute(WEIGHT);
			edge.setAttribute(WEIGHT, incrementWeightStringValue(weightString));
		}
		else {
			edge.setAttribute(WEIGHT, "2");
		}
	}
Returns the vertex with the given vertex id
@param vertexId the id of the vertex to retrieve
@return  the vertex with the given vertex id or null if none found
Ghidra/Framework/Graph/src/main/java/ghidra/service/graph/AttributedGraph.java