@Override
		public Color getBackgroundColor(BigInteger index) {
			BigInteger highlightIndex = getHighlightIndex(highlightAddress);
			if (!highlightIndex.equals(index)) {
				return highlightDefaultBackgroundColor;
			}
			return highlightColor;
		}
Signals to rebuild this component's data model.  This call should not do any real work
if the model is not 'dirty'.
Ghidra/Features/FunctionGraph/src/main/java/ghidra/app/plugin/core/functiongraph/graph/vertex/ListingGraphComponentPanel.java