@Override
	public void dispose() {
		groupListener = null;

		for (FGVertex vertex : vertices) {
			vertex.dispose();
		}
		vertices.clear();
		super.dispose();
	}
Creates a new group based upon this one, but with the given vertices (and incident edges)
removed. 

@param verticesToRemove the vertices to not include in the new group
@return the new group
Ghidra/Features/FunctionGraph/src/main/java/ghidra/app/plugin/core/functiongraph/graph/vertex/GroupedFunctionGraphVertex.java