../../.pub-cache/hosted/pub.dev/showcaseview-2.1.1/lib/src/tooltip_widget.dart:156:14: Error: The getter 'headline6' isn't defined for the class 'TextTheme'.
'TextTheme' is from 'package:flutter/src/material/text_theme.dart' ('../../flutter/packages/flutter/lib/src/material/text_theme.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'headline6'.
.headline6!
../../.pub-cache/hosted/pub.dev/showcaseview-2.1.1/lib/src/tooltip_widget.dart:156:14: Error: The getter 'headline6' isn't defined for the class 'TextTheme'.