multi my-await(Awaitable $a) { my-await await $a } multi my-await(@a) { @a.map: { my-await $_ } } multi my-await($a) { $a } say my-await start { start { start { start { 42 } } } } say my-await start { 1, start { 2, start { 3, start { 4, 5, 6 } } } }