def uint32.fin
import bendonnect-rpc@0.1.0.0/src/pbjson.bend as Pbjsonimport Base
import bend-kit-protobuf@0.1.0.0/protobuf.bend as Pb
450def uint32.fin(m: Maybe<&2, Pb.Word64>) -> Maybe<&2, U32>:
451 match m:
452 case None{}:
453 None{}
454 case Some{w}:
455 Pb.Word64{+h, +l} = w
456 Bool.pick(Maybe<&2, U32>, U32.is_zero(h), Some{l}, None{})