private @NotNull PreviewHandler<IntentionActionWithTextCaching> getPreviewHandler() {
      return new PreviewHandler<>(
        myProject, myListPopup,
        IntentionActionWithTextCaching.class,
        action -> new IntentionPreviewComputable(
          myProject, action.getAction(), myFile, myEditor, action.getFixOffset()).call());
    }
private @NotNull PreviewHandler<IntentionActionWithTextCaching> getPreviewHandler()