@Override
		public String toString() {
			//@formatter:off
			return "{\n" +
				"\tv: " + v + ",\n" +
				"\tleft: " + left + ",\n" +
				"\tright: " + right + "\n" + 
			"}";
			//@formatter:on
		}
A simple layout that is used during testing
Ghidra/Features/FunctionGraph/src/test.slow/java/ghidra/app/plugin/core/functiongraph/graph/layout/TestFGLayoutProvider.java