I'm trying to make a structure that spawns when the world generates. However, this line of code isn't working in my IStructure reference class:
public static final WorldServer worldServer = FMLCommonHandler.instance().getMinecraftServerInstance().getWorld(0);
Eclipse can't seem to find the file "net.minecraft.world.WorldServer". Nor can it find "net.minecraftforge.fml.common.FMLCommonHandler." Am I missing the files or was it changed with a newer minecraft forge update? If so, do you know what the new way of doing this is?