Point2D getVertexLocation() {
		return locationInfo.getPoint();
	}
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