$menuItems = [
   'foo',
   'bar',
   [ 'command', 'baz', [ \&BazRoutine, $bazarg0, $bazarg1 ] ],
   [ 'cascade', 'qux', [
       'huzzah',
       'fizzle',
       [ 'command', 'bagel', \&BagelRoutine ],
   ],
   'frank',
];