notnull

java/idea-ui/src/com/intellij/openapi/roots/ui/configuration/artifacts/nodes/PackagingElementNode.java

@@ -80,6 +80,7 @@ public class PackagingElementNode<E extends PackagingElement<?>> extends Artifac
     return myPackagingElements.size() == 1 ? myPackagingElements.get(0) : null;
   }
 
+  @NotNull
   @Override
   public Object[] getEqualityObjects() {
     return ArrayUtil.toObjectArray(myPackagingElements);

java/idea-ui/src/com/intellij/openapi/roots/ui/configuration/artifacts/sourceItems/SourceItemNode.java

@@ -20,6 +20,7 @@ import com.intellij.openapi.roots.ui.configuration.artifacts.ArtifactEditorEx;
 import com.intellij.packaging.ui.ArtifactEditorContext;
 import com.intellij.packaging.ui.PackagingSourceItem;
 import com.intellij.ui.treeStructure.SimpleTree;
+import org.jetbrains.annotations.NotNull;
 
 import java.awt.event.InputEvent;
 import java.util.Collections;
@@ -35,6 +36,7 @@ public class SourceItemNode extends SourceItemNodeBase {
     mySourceItem = sourceItem;
   }
 
+  @NotNull
   @Override
   public Object[] getEqualityObjects() {
     return new Object[]{mySourceItem};

java/idea-ui/src/com/intellij/openapi/roots/ui/configuration/artifacts/sourceItems/SourceItemsTreeRoot.java

@@ -35,6 +35,7 @@ public class SourceItemsTreeRoot extends SourceItemNodeBase {
     return null;
   }
 
+  @NotNull
   @Override
   public Object[] getEqualityObjects() {
     return new Object[]{"root"};

java/idea-ui/src/com/intellij/openapi/roots/ui/configuration/projectRoot/daemon/ProjectStructureDaemonAnalyzer.java

@@ -290,6 +290,7 @@ public class ProjectStructureDaemonAnalyzer implements Disposable {
       return myElement.equals(other.myElement) && (!other.myCheck || myCheck) && (!other.myCollectUsages || myCollectUsages);
     }
 
+    @NotNull
     @Override
     public Object[] getEqualityObjects() {
       return myEqualityObjects;

java/idea-ui/src/com/intellij/util/ui/classpath/ChooseLibrariesDialogBase.java

@@ -269,6 +269,7 @@ public abstract class ChooseLibrariesDialogBase extends DialogWrapper {
       return 0;
     }
 
+    @NotNull
     @Override
     public Object[] getEqualityObjects() {
       return new Object[] {myElement};