# Pastebin ldYRYfg5
sub librerify(&sub) {
   my %cmds = do for &sub.candidates>>.signature>>.params { my @params = .self;
      my @cmd =  @params.grep({ .elems == 1 && .head ~~ Str with .constraint_list})>>.constraint_list>>[0];

      @cmd.join("-") => &sub.assuming(|@cmd) if @cmd
   }
   %cmds
}



sub bla("bla", "ble", Int $n) { say $n }

librerify(&bla).<bla-ble>(42)