From 03a1aee3966635bcc1d45129b5d529638adca4d8 Mon Sep 17 00:00:00 2001
From: Fabio Scotto di Santolo <fabio.scottodisantolo@protonmail.com>
Date: Wed, 10 Oct 2018 20:11:31 +0200
Subject: [PATCH] fix

---
 src/com/oracle/java8/professional/CollectionTest.java | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/com/oracle/java8/professional/CollectionTest.java b/src/com/oracle/java8/professional/CollectionTest.java
index 89d3db6..0746bde 100644
--- a/src/com/oracle/java8/professional/CollectionTest.java
+++ b/src/com/oracle/java8/professional/CollectionTest.java
@@ -49,4 +49,12 @@ public class CollectionTest {
 		System.out.println(((TreeMap<String, String>) m).firstKey());
 		System.out.println(((TreeMap<String, String>) m).lastKey());
 	}
+
+	//public static <S, T extends S> void addAll(Collection<T> a, Collection<S> b) {}
+
+	//public static <T> void addAll(Collection<T> a, Collection<? super T> b) {}
+
+	//public static <T> void addAll(Collection<? extends T> a, Collection<T> b) {}
+
+	//public static <T> void addAll(Collection<? extends T> a, Collection<? super T> b) {}
 }