private List<String> getByteGroups(String input) {
		List<String> list = new ArrayList<String>();
		StringTokenizer st = new StringTokenizer(input);
		while (st.hasMoreTokens()) {
			list.add(st.nextToken());
		}
		return list;
	}
Returns the byte value to be used for the given hex bytes.  Handles wildcard characters by
return treating them as 0s.
Ghidra/Features/Base/src/main/java/ghidra/features/base/memsearch/format/HexSearchFormat.java