public Builder setAbilities(
          int index, org.bwapi.proxy.messages.GameMessages.TechType.Builder builderForValue) {
        if (abilitiesBuilder_ == null) {
          ensureAbilitiesIsMutable();
          abilities_.set(index, builderForValue.build());
          onChanged();
        } else {
          abilitiesBuilder_.setMessage(index, builderForValue.build());
        }
        return this;
      }