@Override
	public FunctionGraph getVisualGraph() {
		return (FunctionGraph) super.getVisualGraph();
	}
Adapts the {@link AbstractFlowChartLayout} to work for {@link FunctionGraph}s.
Ghidra/Features/FunctionGraph/src/main/java/ghidra/app/plugin/core/functiongraph/graph/layout/flowchart/FGFlowChartLayout.java