whereWidth method
Creates a WidgetSelector that finds all SizedBox where width matches the condition.
Example usage:
spot<SizedBox>().whereWidth((it) => it.isGreaterThan(10.5)).existsOnce();
Implementation
@useResult
WidgetSelector<SizedBox> whereWidth(MatchProp<double> match) {
return withDiagnosticProp<double>('width', match);
}