Can't Import ChestGenHooks of WeightedRandomChestContent ??

[Meep-Morp]

Ok, so I took out Sam's Teach Yourself Mod Development in 24 Hours from the local library, and I'm using it to try to learn to mod. It's outdated though and some of the code has obviously changed. Since it's a library book, I assume trying to register it to get updated info isn't going to work, and theres no library login info written in the book or anything so I'm just not going to even try that. I've been able to find the solutions to my problems on my own until now. 

 

I am at this section where the book teaches you how to add or remove items from the spawn chance of dungeon chests. It requires you to import "net.minecraftforge.common.ChestGenHooks" and "net.minecraft.util.WeightedRandomChestContent" in order to use them. However when I add those to my list of imports, I get "The import "insert file name here" cannot be resolved" for both of them. Have these files been removed? I've googled this and just cannot seem to find the answer. Going to skip ahead in the book but I just wanted to know if anyone had a quick answer for this. Thank you in advanced for your time and knowledge!!

[Draco18s]

It doesn't exist any more.  Loot is now handled by LootTables and json definitions.

[Meep-Morp]

Thak you!  I should hopefully be able to figure this out from here now.