tree
The roots of the schema model. Wire will prune the schema model to only include types in this list and the types transitively required by them.
If a member is included in this list then the enclosing type is included but its other members are not. For example, if squareup.dinosaurs.Dinosaur#name is in this list then the emitted source of the Dinosaur message will have the name field, but not the length_meters or mass_kilograms fields.