trying to overload a function to detect no arguments passed

test.p6

package Documentable::CLI {

    sub RUN-MAIN(|c) is export {
        my %*SUB-MAIN-OPTS = :named-anywhere;
        CORE::<&RUN-MAIN>(|c)
    }

    our proto MAIN(|) is export { * }

    multi MAIN () {
        say 'Execute "documentable --help" for more information'
    }

    multi MAIN ( "start" ) {}

}

# no output
Documentable::CLI::MAIN();