public void clearVertexLocation(FGVertex vertex) {
		Address address = vertex.getVertexAddress();
		if (vertex instanceof GroupedFunctionGraphVertex) {
			groupLocationUpdateMap.put(address, null);
		}
		else {
			locationUpdateMap.put(address, null);
		}
	}
Note: this method does not clear group vertex locations.
@param functionGraph function graph
Ghidra/Features/FunctionGraph/src/main/java/ghidra/app/plugin/core/functiongraph/mvc/FunctionGraphVertexAttributes.java