SLING-6244 use @CheckForNull for return value

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk/contrib/extensions/contextaware-config/spi@1768474 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/java/org/apache/sling/caconfig/resource/spi/CollectionInheritanceDecider.java b/src/main/java/org/apache/sling/caconfig/resource/spi/CollectionInheritanceDecider.java
index 1713f0a..ca46715 100644
--- a/src/main/java/org/apache/sling/caconfig/resource/spi/CollectionInheritanceDecider.java
+++ b/src/main/java/org/apache/sling/caconfig/resource/spi/CollectionInheritanceDecider.java
@@ -18,6 +18,7 @@
  */
 package org.apache.sling.caconfig.resource.spi;
 
+import javax.annotation.CheckForNull;
 import javax.annotation.Nonnull;
 
 import org.apache.sling.api.resource.Resource;
@@ -42,6 +43,6 @@
      * @param resource The resource
      * @return The decision or {@code null}
      */
-    @Nonnull InheritanceDecision decide(@Nonnull Resource resource, @Nonnull String bucketName);
+    @CheckForNull InheritanceDecision decide(@Nonnull Resource resource, @Nonnull String bucketName);
 
 }