Element toXML() {
		Element vertexInfoElement = new Element(getVertexInfoElementName());

		//
		// sub-tags:
		// -address info
		// -location
		// -edge infos
		// --address info
		// --flow type
		// --articulation points
		vertexAddressInfo.write(vertexInfoElement);

		Element locationElement = new Element(LOCATION_INFO_ELEMENT_NAME);
		locationInfo.write(locationElement);
		vertexInfoElement.addContent(locationElement);
		return vertexInfoElement;
	}
Finds an existing vertex represented by this info.  Returns null if no vertex exists to 
match this info (this can happen if the code block structure has changed).

@param controller The controller used for the current function graph
@return an existing vertex represented by this info.  Returns null if no vertex exists to 
        match this info
Ghidra/Features/FunctionGraph/src/main/java/ghidra/app/plugin/core/functiongraph/graph/vertex/VertexInfo.java