SuperMartijn642's Config Lib adds lots of basic implementations for guis that allow for similar code between Minecraft 1.12, 1.14, 1.15, and 1.16!

CurseForge

For more info and downloads, check out the project on CurseForge

FAQ

Can I use your mod in my modpack?
Yes, feel free to use my mod in your modpack

Discord

For future content, upcoming mods, and discussion, feel free to join the SuperMartijn642 discord server!