TutorialMod class or the Main java class

package com.archisman.tutorialmod;

import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.eventbus.api.SubscribeEvent;
import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.fml.event.lifecycle.FMLClientSetupEvent;
import net.minecraftforge.fml.event.lifecycle.FMLCommonSetupEvent;
import net.minecraftforge.fml.event.server.FMLServerStartingEvent;
import net.minecraftforge.fml.javafmlmod.FMLJavaModLoadingContext;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

@Mod("tutorialmod")
public class TutorialMod
{

    private static final Logger LOGGER = LogManager.getLogger();
    public static final String MOD_ID = "tutorialmod";
    public static TutorialMod instance;

    public TutorialMod() {

        FMLJavaModLoadingContext.get().getModEventBus().addListener(this::setup);
        FMLJavaModLoadingContext.get().getModEventBus().addListener(this::doClientStuff);


        instance = this;
        MinecraftForge.EVENT_BUS.register(this);
    }

    private void setup(final FMLCommonSetupEvent event)
    {

    }

    private void doClientStuff(final FMLClientSetupEvent event)
    {


    }

    @SubscribeEvent
    public void onServerStarting(FMLServerStartingEvent event)
    {

    }

}