val treeShakingRoots: List<String>
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.