public Builder mergeInitialPosition(org.bwapi.proxy.messages.BasicTypes.Position value) {
        if (initialPositionBuilder_ == null) {
          if (((bitField0_ & 0x04000000) == 0x04000000) &&
              initialPosition_ != org.bwapi.proxy.messages.BasicTypes.Position.getDefaultInstance()) {
            initialPosition_ =
              org.bwapi.proxy.messages.BasicTypes.Position.newBuilder(initialPosition_).mergeFrom(value).buildPartial();
          } else {
            initialPosition_ = value;
          }
          onChanged();
        } else {
          initialPositionBuilder_.mergeFrom(value);
        }
        bitField0_ |= 0x04000000;
        return this;
      }