wrap method
- BuildContext context,
 - Widget child
 
override
    Return a copy of this inherited theme with the specified child.
This implementation for TooltipTheme is typical:
Widget wrap(BuildContext context, Widget child) {
  return TooltipTheme(data: data, child: child);
}
Implementation
@override
Widget wrap(BuildContext context, Widget child) {
  return DefaultTextStyle(
    style: style,
    textAlign: textAlign,
    softWrap: softWrap,
    overflow: overflow,
    maxLines: maxLines,
    textWidthBasis: textWidthBasis,
    textHeightBehavior: textHeightBehavior,
    child: child,
  );
}