Migrate Carpet Mixin names to mojang mappings

src/main/java/carpet/mixins/ServerEntity_leashFixMixin.java

@@ -0,0 +1,34 @@
+package carpet.mixins;
+
+import carpet.CarpetSettings;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import java.util.function.Consumer;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.network.protocol.game.ClientboundSetEntityLinkPacket;
+import net.minecraft.server.level.ServerEntity;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.entity.Mob;
+
+@Mixin(ServerEntity.class)
+public class ServerEntity_leashFixMixin
+{
+    @Shadow @Final private Entity entity;
+
+    @Inject(method = "sendPairingData", at = @At("RETURN"))
+    private void sendLeashPackets(Consumer<Packet<?>> consumer_1, CallbackInfo ci)
+    {
+        if (CarpetSettings.leadFix)
+        {
+            if (entity instanceof Mob)
+            {
+                consumer_1.accept( new ClientboundSetEntityLinkPacket(entity, ((Mob) entity).getLeashHolder()));
+            }
+        }
+    }
+}