method Datastore.prototype.upsert Datastore.prototype.upsert(entities: Entities): Promise<UpsertResponse> Maps to Datastore#save, forcing the method to be upsert. Parameters entities: Entities Datastore key object(s). Return Type Promise<UpsertResponse> Datastore.prototype.upsert(entities: Entities,callback: UpsertCallback,): void Parameters entities: Entities callback: UpsertCallback Return Type void