static boolean isZero(Insets insets) {
    if (insets instanceof JBInsets jbInsets && jbInsets.unscaledSupplier != null) {
      return false; // Even if these are zero now, they can be non-zero later (e.g. if the theme is changed or compact mode toggled).
    }
    // Scaling doesn't matter here, as zero is zero regardless of scaling:
    return insets.top == 0 && insets.left == 0 && insets.bottom == 0 && insets.right == 0;
  }
static boolean isZero(Insets insets)