Running an asyncronous piece of code at a later date

Promisify.md

I have a piece of asyncronous code I would like to run at a later date. I figured a Promise would suit this purpose fine.

So far this is what I have:

sub makePromise ( $o, $m, :$in = 0, :$args = @() ) {
  my $p = Promise.new;

  for $args {
    .wrap({
      nextsame;
      $p.keep;
    }) if Callable;
  }

  $o."$m"( |$args );

  $p;
}

Am I missing anything....