@Override
	public void programLocationChanged(ProgramLocation location, EventTrigger trigger) {
		if (trigger == EventTrigger.GUI_ACTION) {
			handleLocationChangedFromVertex(location);
		}
	}
Sets the message that will appear in the lower part of the graph.

@param message the message to display
Ghidra/Features/FunctionGraph/src/main/java/ghidra/app/plugin/core/functiongraph/mvc/FGController.java