public void setSelectedColorTransformer(Function<E, Color> transformer) {
		this.selectedColorTransformer = Objects.requireNonNull(transformer);
	}
Sets the color provider to use when drawing this edge when the edge is selected. 
@param transformer the color provider
Ghidra/Framework/Graph/src/main/java/ghidra/graph/viewer/edge/VisualEdgeRenderer.java