static Arg parameter(String longName, String shortName, String exampleValue, String description) {
            return new Arg(longName, shortName, exampleValue, description);
        }
Prints the generated help to the given printer.

@param colors Color formatter.
@param printer CliPrinter to write to.
smithy-cli/src/main/java/software/amazon/smithy/cli/HelpPrinter.java