public List<Varnode> getVarnodes() {
		List<Varnode> tmp = new ArrayList<>(storage);
		if (stackStorage != null) {
			// add stack storage to the front for LE and back of the list for BE
			tmp.add(program.isBigEndian() ? tmp.size() : 0, stackStorage);
		}
		return tmp;
	}
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