Shopify/batman — comment on commit 65104639fabeb0901fd7087094144d69fbae2473
File:  line 0
By ktusznio:

A) That's the exact reason I did this. It's annoying to have that code everywhere you just want a set of ids.
B) Fair point, though I think in 90+% of cases sets will have Batman objects.
C) `pluck` does sound better. @jamesmacaulay didn't like passing a string to `map` so we went with `mapToProperty`