Tab constructor

const Tab({
  1. Key? key,
  2. String? text,
  3. Widget? icon,
  4. EdgeInsetsGeometry? iconMargin,
  5. double? height,
  6. Widget? child,
})

Creates a Material Design TabBar tab.

At least one of text, icon, and child must be non-null. The text and child arguments must not be used at the same time. The iconMargin is only useful when icon and either one of text or child is non-null.

Implementation

const Tab({super.key, this.text, this.icon, this.iconMargin, this.height, this.child})
  : assert(
      text != null || child != null || icon != null,
      'Tab requires at least one of text, child, or icon to be non-null.',
    ),
    assert(
      text == null || child == null,
      'Provide either text or child, not both, when creating a Tab.',
    );