@Override
		public int compareTo(ResourceRef o) {
			if (o == null) {
				return 1;
			}
			return toString().compareTo(o.toString());
		}
A <code>ResourceResolver</code> that, when given a resource string which
looks like a path to a file on the local file system, will return a reference
to that file.
src/main/java/dev/jbang/source/resolvers/FileResourceResolver.java