docs: update object pool

object-pool/src/main/java/com/iluwatar/object/pool/Oliphaunt.java

@@ -25,6 +25,7 @@
 package com.iluwatar.object.pool;
 
 import java.util.concurrent.atomic.AtomicInteger;
+import lombok.Getter;
 import lombok.extern.slf4j.Slf4j;
 
 /**
@@ -35,6 +36,7 @@ public class Oliphaunt {
 
   private static final AtomicInteger counter = new AtomicInteger(0);
 
+  @Getter
   private final int id;
 
   /**
@@ -49,10 +51,6 @@ public class Oliphaunt {
     }
   }
 
-  public int getId() {
-    return id;
-  }
-
   @Override
   public String toString() {
     return String.format("Oliphaunt id=%d", id);