private com.google.protobuf.RepeatedFieldBuilder<
          org.bwapi.proxy.messages.GameMessages.UnitId, org.bwapi.proxy.messages.GameMessages.UnitId.Builder, org.bwapi.proxy.messages.GameMessages.UnitIdOrBuilder> 
          getSelectedUnitsFieldBuilder() {
        if (selectedUnitsBuilder_ == null) {
          selectedUnitsBuilder_ = new com.google.protobuf.RepeatedFieldBuilder<
              org.bwapi.proxy.messages.GameMessages.UnitId, org.bwapi.proxy.messages.GameMessages.UnitId.Builder, org.bwapi.proxy.messages.GameMessages.UnitIdOrBuilder>(
                  selectedUnits_,
                  ((bitField0_ & 0x00010000) == 0x00010000),
                  getParentForChildren(),
                  isClean());
          selectedUnits_ = null;
        }
        return selectedUnitsBuilder_;
      }