public void clear() {
		model.cancelAll();
		viewSettings = new NoFunctionGraphViewSettings();

		if (functionGraphData == null || functionGraphData.hasResults()) {
			doSetFunctionGraphData(new EmptyFunctionGraphData("No Function"));
		}
	}
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