public void setVarnodes(List<Varnode> newStorage) {
		clearStorage();
		this.storage = newStorage;
		Varnode lastNode = !storage.isEmpty() ? storage.get(storage.size() - 1) : null;
		if (lastNode != null && DWARFUtil.isStackVarnode(lastNode)) {
			stackStorage = lastNode;
			storage.remove(storage.size() - 1);
		}
	}
If this is a static/global variable, stored at a ram address, return it's
ram address.

@return address of where this variable is stored, null if not ram address
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/dwarf/DWARFVariable.java