public static void main(String[] args) throws Exception {
		ShellReferenceDoc doc = new ShellReferenceDoc();
		doc.out = args.length == 1 ? new PrintStream(args[0]) : System.out;

		doc.doIt();

	}
A mapping from class to Title in the doc. Insertion order will become rendering order.
documentation-toolchain/src/test/java/org/springframework/xd/documentation/ShellReferenceDoc.java