whereOpacity method
Creates a WidgetSelector that finds all Image where opacity matches the condition.
Example usage:
spot<Image>().whereOpacity((it) => it.equals(null)).existsOnce();
Implementation
@useResult
WidgetSelector<Image> whereOpacity(MatchProp<Animation<double>?> match) {
return withDiagnosticProp<Animation<double>?>('opacity', match);
}