From 5eb6df834863e6a7003aed6dc9b7d97668d04f4e Mon Sep 17 00:00:00 2001
From: Denis Zhdanov <Denis.Zhdanov@jetbrains.com>
Date: Thu, 3 Mar 2011 19:01:02 +0300
Subject: [PATCH] IDEA-66185 Malformed format string inspection: Instruct the
 inspection that int -> char conversion is correct

Utility collection population method signature is corrected in order to covariantly return given IS-A Collection instead of Collection
---
 .../src/com/intellij/util/containers/ContainerUtil.java    | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/platform/util/src/com/intellij/util/containers/ContainerUtil.java b/platform/util/src/com/intellij/util/containers/ContainerUtil.java
index ecfb00ea0c68..e684e0829570 100644
--- a/platform/util/src/com/intellij/util/containers/ContainerUtil.java
+++ b/platform/util/src/com/intellij/util/containers/ContainerUtil.java
@@ -488,7 +488,7 @@ public class ContainerUtil {
     }
   }
 
-  public static <T> Collection<T> addAll(@NotNull Collection<T> collection, @NotNull T... elements) {
+  public static <T, A extends T, C extends Collection<T>> C addAll(@NotNull C collection, @NotNull A... elements) {
     //noinspection ManualArrayToCollectionCopy
     for (T element : elements) {
       collection.add(element);
@@ -842,6 +842,11 @@ public class ContainerUtil {
     return result.toArray(emptyArray);
   }
 
+  @NotNull
+  public static <T> Set<T> set(T ... items) {
+    return addAll(new HashSet<T>(), items);
+  }
+  
   public static <T> void addIfNotNull(final T element, @NotNull Collection<T> result) {
     if (element != null) {
       result.add(element);