use Comparator.comparing

java/debugger/impl/src/com/intellij/debugger/jdi/DecompiledLocalVariable.java

@@ -27,8 +27,6 @@ import java.util.Comparator;
  *         Date: 10/7/13
  */
 public class DecompiledLocalVariable{
-  public static final Comparator<DecompiledLocalVariable> COMPARATOR = (v1, v2) -> v1.getSlot() - v2.getSlot();
-
   private final int mySlot;
   private final String mySignature;
   private final boolean myIsParam;

java/debugger/impl/src/com/intellij/debugger/jdi/LocalVariablesUtil.java

@@ -303,7 +303,7 @@ public class LocalVariablesUtil {
         }
 
         List<DecompiledLocalVariable> vars = new ArrayList<>(usedVars.values());
-        Collections.sort(vars, DecompiledLocalVariable.COMPARATOR);
+        vars.sort(Comparator.comparingInt(DecompiledLocalVariable::getSlot));
         return vars;
       }
     }