@Override
  public @NotNull IntentionPreviewInfo generatePreview(@NotNull Project project, @NotNull Editor editor, @NotNull PsiFile file) {
    return new IntentionPreviewInfo.CustomDiff(JavaFileType.INSTANCE, "", "public interface " + myInterfaceName + " {}");
  }
@Override
  public @NotNull IntentionPreviewInfo generatePreview(@NotNull Project project, @NotNull Editor editor, @NotNull PsiFile file)