@NotNull
  private static SimpleTextAttributes deriveBgColor(@NotNull SimpleTextAttributes attributes, @Nullable Color fileBgColor) {
    if (fileBgColor != null) {
      attributes = attributes.derive(-1, null, fileBgColor, null);
    }
    return attributes;
  }
@NotNull
  private static SimpleTextAttributes deriveBgColor(@NotNull SimpleTextAttributes attributes, @Nullable Color fileBgColor)