public Builder addAllBodies(
          java.lang.Iterable<? extends org.box2d.proto.Box2D.PbBody> values) {
        if (bodiesBuilder_ == null) {
          ensureBodiesIsMutable();
          super.addAll(values, bodies_);
          onChanged();
        } else {
          bodiesBuilder_.addAllMessages(values);
        }
        return this;
      }