CheckChunk.java

import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;
import java.io.File;

public class CheckChunk {
    public static void main(String[] args) throws Exception {
        File jarFile = new File("C:\\Users\\MrLogiousBanana\\.gradle\\caches\\fabric-loom\\1.21.1\\net.fabricmc.yarn.1_21_1.1.21.1+build.3-v2\\minecraft-project-@-merged-named.jar");
        URLClassLoader cl = new URLClassLoader(new URL[]{jarFile.toURI().toURL()}, null);
        Class<?> chunkClass = cl.loadClass("net.minecraft.world.chunk.Chunk");
        for (Method m : chunkClass.getMethods()) {
            if (m.getName().equals("setBlockState") || m.getName().equals("method_12010")) {
                System.out.println(m);
            }
        }
    }
}