public Builder setMorphedUnits(
          int index, org.bwapi.proxy.messages.GameMessages.UnitId.Builder builderForValue) {
        if (morphedUnitsBuilder_ == null) {
          ensureMorphedUnitsIsMutable();
          morphedUnits_.set(index, builderForValue.build());
          onChanged();
        } else {
          morphedUnitsBuilder_.setMessage(index, builderForValue.build());
        }
        return this;
      }