public void display(Program program, ProgramLocation location) {
		if (viewContainsLocation(location)) {
			// no need to rebuild the graph; just set the location
			viewSettings.setLocation(location);
			return;
		}

		if (loadCachedGraphData(program, location)) {
			// no need to rebuild the graph; just set the location
			viewSettings.setLocation(location);
			return;
		}

		doDisplay(program, location, null /* don't keep current perspective*/);
	}
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