my nmshandeler

import net.minecraft.network.protocol.game.PacketPlayOutEntityMetadata;
import net.minecraft.network.syncher.DataWatcher;
import net.minecraft.network.syncher.DataWatcherRegistry;
import net.minecraft.server.level.EntityPlayer;
import org.bukkit.craftbukkit.v1_20_R1.entity.CraftPlayer;
import org.bukkit.entity.Player;

import java.util.List;

public class NMSHandler extends nl.rubixdevelopment.oldswimming.modules.swimming.nms.NMSHandler {

    public void setPlayerPose(Player player) {
        final CraftPlayer craftPlayer = (CraftPlayer) player;
        final EntityPlayer entityPlayer = craftPlayer.getHandle();

        final DataWatcher dataWatcher = new DataWatcher(entityPlayer);
        dataWatcher.set(DataWatcherRegistry.a.a(6), (byte) 0x02); // 6 is the index for entity pose

        // Create PacketPlayOutEntityMetadata packet with updated DataWatcher
        final PacketPlayOutEntityMetadata entityMetadataPacket = new PacketPlayOutEntityMetadata(entityPlayer.getId(), dataWatcher, true);

        // Send the packet
        entityPlayer.b.sendPacket(entityMetadataPacket);
    }
}