Board class calls unreferenced libraries

[ChaiaEran]

Your board class calls
import it.unimi.dsi.fastutil.ints.Int2ObjectMap; import it.unimi.dsi.fastutil.ints.Int2ObjectMaps; import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
But the only referenced libraries are Guava.

[EmmanuelMurage]

https://jar-download.com/artifacts/it.unimi.dsi/fastutil/7.1.0/source-code

Download the library there then add it as a dependency
For the newbies:
1.Download
2. Go to file.
3. Click Project Structure.
4. Go to Project Settings then go to the modules tab.
5. Click + button on the right to add the dependency.