private static int findOffsetToInsertMethodTo(Editor editor, PsiFile file) {
      int result = editor.getCaretModel().getOffset();

      PsiClass classAtCursor =
          PsiTreeUtil.getParentOfType(file.findElementAt(result), PsiClass.class, false);

      while (classAtCursor != null && !(classAtCursor.getParent() instanceof PsiFile)) {
        result = classAtCursor.getTextRange().getEndOffset();
        classAtCursor = PsiTreeUtil.getParentOfType(classAtCursor, PsiClass.class);
      }

      return result;
    }