public void dispose() {
		if (graph == null) {
			return;
		}
		graph.dispose();
		graph = null;
	}
An object that represents data for the FunctionGraph plugin.  This object has necessary
information to create a Graph.
Ghidra/Features/FunctionGraph/src/main/java/ghidra/app/plugin/core/functiongraph/mvc/FGData.java