The only non-constant strategy made a constant (for readability)

compiler/frontend/src/org/jetbrains/jet/lang/diagnostics/Errors.java

@@ -314,13 +314,7 @@ public interface Errors {
             DiagnosticFactory2.create(ERROR, DECLARATION_RETURN_TYPE);
 
     DiagnosticFactory2<JetProperty, PropertyDescriptor, PropertyDescriptor> VAR_OVERRIDDEN_BY_VAL =
-            DiagnosticFactory2.create(ERROR, new PositioningStrategy<JetProperty>() {
-                @NotNull
-                @Override
-                public List<TextRange> mark(@NotNull JetProperty property) {
-                    return markNode(property.getValOrVarNode());
-                }
-            });
+            DiagnosticFactory2.create(ERROR, VAL_OR_VAR_NODE);
 
     DiagnosticFactory2<PsiElement, JetClassOrObject, CallableMemberDescriptor> ABSTRACT_MEMBER_NOT_IMPLEMENTED =
             DiagnosticFactory2.create(ERROR);

compiler/frontend/src/org/jetbrains/jet/lang/diagnostics/PositioningStrategies.java

@@ -264,6 +264,14 @@ public class PositioningStrategies {
         }
     };
 
+    public static PositioningStrategy<JetProperty> VAL_OR_VAR_NODE = new PositioningStrategy<JetProperty>() {
+        @NotNull
+        @Override
+        public List<TextRange> mark(@NotNull JetProperty property) {
+            return markNode(property.getValOrVarNode());
+        }
+    };
+
     public static PositioningStrategy<JetWhenEntry> ELSE_ENTRY = new PositioningStrategy<JetWhenEntry>() {
         @NotNull
         @Override