DataFixersMixin.java

package me.steinborn.lazydfu.mixin;

import com.google.common.util.concurrent.MoreExecutors;
import net.minecraft.util.datafix.DataFixers;
import org.spongepowered.asm.mixin.Mixin;
import org.spongepowered.asm.mixin.injection.At;
import org.spongepowered.asm.mixin.injection.Redirect;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.ThreadFactory;

@Mixin(DataFixers.class)
public class DataFixersMixin {
    @Redirect(method = "createFixerUpper", at = @At(value = "INVOKE", target = "Ljava/util/concurrent/Executors;newSingleThreadExecutor(Ljava/util/concurrent/ThreadFactory;)Ljava/util/concurrent/ExecutorService;"))
    private static ExecutorService createFixerUpper$directExecutor(ThreadFactory threadFactory) {
        return MoreExecutors.newDirectExecutorService();
    }
}