Cannot resolve symbol 'ItemGroupEvents'

[xiaoliuprogrammer]

Description

I was trying to adding an item to Item Groups, here is code:

package name.myfirstmod;

import name.myfirstmod.registry.ModItems;
import net.fabricmc.api.ModInitializer;

import net.fabricmc.fabric.impl.item.group.ItemGroupExtensions;
import net.minecraft.item.ItemGroup;
import net.minecraft.item.Items;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import static name.myfirstmod.registry.ModItems.SUSPICIOUS_SUBSTANCE;

@Override
	public void onInitialize() {
		ItemGroupEvents.modifyEntriesEvent(ItemGroup.BUILDING_BLOCKS).register(content -> {
			content.addAfter(Items.OAK_DOOR,SUSPICIOUS_SUBSTANCE);
		});

		LOGGER.info("Hello Fabric world!");
		ModItems.initialize();
	}

However, IDEA indicates some bugs:

Environment details:

• Minecraft version: 1.18.1
• Fabric Loader version: 0.16.3

Questions

1. Why cannot resolve symbol 'ItemGroupEvents'?
2. In version 1.18.1, is there a different method for adding Item Groups?
3. How can I add items to an Item Group in verison1.18.1?

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This is my first time asking a question here. If there is any additional information needed, please let me know.
I would be extremely grateful for any insights or suggestions you may have. Thank you very much for your assistance!