@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((end == null) ? 0 : end.hashCode());
		result = prime * result + ((start == null) ? 0 : start.hashCode());
		return result;
	}
An implementation of {@link VisualEdge} that implements the base interface so subclasses 
do not have to.

@param <V> the vertex type
Ghidra/Framework/Graph/src/main/java/ghidra/graph/viewer/edge/AbstractVisualEdge.java