public void refreshModel() {
		FGVertexListingModel fgModel = (FGVertexListingModel) getListingModel();
		if (fgModel.refresh()) {
			preferredSizeCache = null;
		}
	}
Overridden to set the view before the parent class notifies the listeners.  This prevents
our methods that calculate preferred size from going 'out to lunch' when attempting to
examine the entire program instead of just the given view.

@param model The listing model needed by the layout model
@return the new model adapter
Ghidra/Features/FunctionGraph/src/main/java/ghidra/app/plugin/core/functiongraph/graph/vertex/FGVertexListingPanel.java