type Pm
import cswap-bend-cli@0.1.0.0/policy/pick.bend as Pickimport Base
21# A pick before it is tagged with its ranking mode: nothing, or a slot with
22# the key it won on.
23type Pm is Data:
24 PmNone{}
25 PmAt{slot: Nat, r: Maybe<&2, Nat>, h: Nat}