public Builder setTargetPosition(org.bwapi.proxy.messages.BasicTypes.Position value) {
        if (targetPositionBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          targetPosition_ = value;
          onChanged();
        } else {
          targetPositionBuilder_.setMessage(value);
        }
        bitField1_ |= 0x00000002;
        return this;
      }