public Builder setStartLocation(org.bwapi.proxy.messages.BasicTypes.TilePosition value) {
        if (startLocationBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          startLocation_ = value;
          onChanged();
        } else {
          startLocationBuilder_.setMessage(value);
        }
        bitField0_ |= 0x00000040;
        return this;
      }