private static InputStream createStream(String resource) {
			URL url = getResourceUrl(resource);
			if (url == null) {
				throw new ResourceNotFoundException(resource, "Resource not found on class path");
			}
			try {
				return url.openStream();
			} catch (IOException e) {
				throw new ResourceNotFoundException(resource, "Could not open input stream for resource", e);
			}
		}
A <code>ResourceResolver</code> that, when given a resource string which
looks like a classpath URL, will look up the referenced resource and, if it's
a file on the local file system return a direct reference to that file or if
it's a JAR resource it will create a copy of it in the cache and return a
reference to that.
src/main/java/dev/jbang/source/resolvers/ClasspathResourceResolver.java