tap { next }

tap { next (1), (2), (3) }

tap { next 1 }

tap { next 1, 2,
3 }

tap { next 1, 2, 3 }

tap { next [1, 2, 3] }

tap { next(
  1
  2
) }

tap { next
1 }

tap { next() }

tap { next(1) }