private com.google.protobuf.RepeatedFieldBuilder<
          org.bwapi.proxy.messages.GameMessages.Unit, org.bwapi.proxy.messages.GameMessages.Unit.Builder, org.bwapi.proxy.messages.GameMessages.UnitOrBuilder> 
          getUnitsFieldBuilder() {
        if (unitsBuilder_ == null) {
          unitsBuilder_ = new com.google.protobuf.RepeatedFieldBuilder<
              org.bwapi.proxy.messages.GameMessages.Unit, org.bwapi.proxy.messages.GameMessages.Unit.Builder, org.bwapi.proxy.messages.GameMessages.UnitOrBuilder>(
                  units_,
                  ((bitField0_ & 0x00000020) == 0x00000020),
                  getParentForChildren(),
                  isClean());
          units_ = null;
        }
        return unitsBuilder_;
      }