private void updateVertexShapesFromOptions(Options rootOptions) {
		Options options = rootOptions.getOptions(VERTEX_SHAPES);
		for (String vertexType : graphType.getVertexTypes()) {
			String current = getVertexShapeName(vertexType);
			String shapeName = options.getString(vertexType, current);
			if (shapeName != null && !shapeName.equals(current)) {
				VertexShape shape = VertexShape.getShape(shapeName);
				if (shape != null) {
					setVertexShape(vertexType, VertexShape.getShape(shapeName));
				}
			}
		}
	}
Loads values from tool options

@param tool the tool from which to update values.
Ghidra/Framework/Graph/src/main/java/ghidra/service/graph/GraphDisplayOptions.java