makeImmutableCopies

If false, repeated and map fields will not have immutable copies made when constructing a com.squareup.wire.Message. It is up to the developer to avoid mutating any Maps or Lists after they are used to create a com.squareup.wire.Message as the com.squareup.wire.Message will reference those collections rather than creating a copy. In exchange, the developer can avoid the overhead of creating a list which can be excessive for long lists or for performance critical usages.