public void resetGraph() {
		if (!functionGraphData.hasResults()) {
			// should not happen
			return;
		}

		// remove all saved locations and group info
		view.clearUserLayoutSettings();

		Function function = functionGraphData.getFunction();
		ProgramLocation location =
			new ProgramLocation(function.getProgram(), function.getEntryPoint());
		rebuildDisplay(function.getProgram(), location, false);

		// we are changing the location above--make sure the external tool knows of it
		ProgramLocation externalLocation = plugin.getProgramLocation();
		if (!externalLocation.getAddress().equals(location.getAddress())) {
			provider.graphLocationChanged(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