void displayLocation(ProgramLocation newLocation) {
		Address newAddress = newLocation != null ? newLocation.getAddress() : null;
		if (isVisible() && newAddress != null) {
			controller.display(currentProgram, newLocation);
		}
	}
Called when for location changes that are <b>external</b> to the function graph (e.g., when
the user clicks in Ghidra's Listing window)

@param newLocation the new location
Ghidra/Features/FunctionGraph/src/main/java/ghidra/app/plugin/core/functiongraph/FGProvider.java