make method static: fix method refs in method body

EA-120553 - assert: MakeMethodStaticProcessor.changeSelfUsage

java/java-tests/testData/refactoring/makeMethodStatic/afterMethodReferenceInTheSameMethod.java

@@ -0,0 +1,13 @@
+import java.util.List;
+import java.util.function.BiConsumer;
+
+class IWalker {
+  public static void walk(I e) {
+    e.getChildren().forEach(IWalker::walk);
+    final BiConsumer<IWalker, I> walk = (iWalker, e1) -> IWalker.walk(e1);
+  }
+
+  interface I {
+    List<I> getChildren();
+  }
+}