Adds a star to a Starrable.

Input fields

input (AddStarInput!)

Return fields

clientMutationId (String)

A unique identifier for the client performing the mutation.

starrable (Starrable!)

The starrable.

Upcoming Change on 2019-01-01 UTC Description: Type for starrable will change from Starrable! to Starrable. Reason: In preparation for an upcoming change to the way we report mutation errors, non-nullable payload fields are becoming nullable.