so it seems like this is composing 3 peeks using different ways. not knowing any gotchas ahead of time I’d guess

peek1.value = 1
peek2.value = 1
peek3.value = 1
peek1.value = 2
peek2.value = 2
peek3.value = 2
peek1.value = 3
peek2.value = 3
peek3.value = 3
collect.size() = 3

but this is the game of streams and I am almost certainly wrong