IDEA-83757 Play framework: navigate from views back to controller methods

platform/lang-api/src/com/intellij/navigation/GotoRelatedItem.java

@@ -75,4 +75,21 @@ public class GotoRelatedItem {
     }
     return items;
   }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+
+    GotoRelatedItem item = (GotoRelatedItem)o;
+
+    if (myElement != null ? !myElement.equals(item.myElement) : item.myElement != null) return false;
+
+    return true;
+  }
+
+  @Override
+  public int hashCode() {
+    return myElement != null ? myElement.hashCode() : 0;
+  }
 }

xml/dom-openapi/src/com/intellij/codeInsight/navigation/DomGotoRelatedItem.java

@@ -32,7 +32,6 @@ public class DomGotoRelatedItem extends GotoRelatedItem {
     myElement = element;
   }
 
-  @NotNull
   @Override
   public String getCustomName() {
     return myElement.getPresentation().getElementName();