DefaultTextStyle in FLutter

If you want to have a default Text Style down the tree.we can use the DefaultTextStyle. All you need to do is to mention the style and wrap the child around DefaultTextStyle.
The text style to apply to descendant Text widgets which don't have an explicit style.

style: TextStyle(
          fontSize: 20,
          fontWeight: FontWeight.bold,
          color: Colors.black,
        ),