I can't get it to compile the previous lines
ModLoadingContext.get().registerExtensionPoint(ExtensionPoint.DISPLAYTEST, ()-> Pair.of(()->FMLNetworkConstants.IGNORESERVERONLY, (version, network) -> {return true;}));
console --> The target type of this expression must be a functional interface
import java.io.File;
import java.util.Iterator;
import java.util.function.Supplier;
import org.apache.commons.lang3.tuple.Pair;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import com.mojang.brigadier.context.CommandContext;
import net.minecraft.world.server.ServerWorld;
import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.eventbus.api.SubscribeEvent;
import net.minecraftforge.fml.ExtensionPoint;
import net.minecraftforge.fml.ModLoadingContext;
import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.fml.event.lifecycle.FMLCommonSetupEvent;
import net.minecraftforge.fml.event.server.FMLServerStartingEvent;
import net.minecraftforge.fml.javafmlmod.FMLJavaModLoadingContext;
import net.minecraftforge.fml.network.FMLNetworkConstants;
I need help --> Version Forge 1.16.4 - 35.1.4
thanks