protected FGData getFunctionGraphData() {
		FGController controller = getFunctionGraphController();
		waitForBusyRunManager(controller);
		waitForAnimation();// just in case we have any restoring animations working
		return (FGData) TestUtils.getInstanceField("functionGraphData", controller);
	}
Added this method for cache testing.  No blocks were needed, just needed another
function to have enough to test a function being removed from the cache.
Ghidra/Features/FunctionGraph/src/test.slow/java/ghidra/app/plugin/core/functiongraph/AbstractFunctionGraphTest.java