Contains metadata about how much money a recommendation can
save or incur.
Attributes
Name
Description
cost
google.type.money_pb2.Money
An approximate projection on amount saved or
amount incurred. Negative cost units indicate
cost savings and positive cost units indicate
increase. See google.type.Money documentation
for positive/negative units.
duration
google.protobuf.duration_pb2.Duration
Duration for which this cost applies.