SPIGOT-5121: Method to set PierceLevel of arrows

src/main/java/org/bukkit/craftbukkit/entity/CraftArrow.java

@@ -39,6 +39,18 @@ public class CraftArrow extends AbstractProjectile implements AbstractArrow {
         getHandle().setDamage(damage);
     }
 
+    @Override
+    public int getPierceLevel() {
+        return getHandle().s(); // PAIL: rename
+    }
+
+    @Override
+    public void setPierceLevel(int pierceLevel) {
+        Preconditions.checkArgument(0 <= pierceLevel && pierceLevel <= Byte.MAX_VALUE, "Pierce level out of range, expected 0 < level < 127");
+
+        getHandle().b((byte) pierceLevel); // PAIL: rename
+    }
+
     @Override
     public boolean isCritical() {
         return getHandle().isCritical();