whereMargin method

Creates a WidgetSelector that finds all Container where margin matches the condition.

Example usage:

spot<Container>().whereMargin((it) => it.equals(EdgeInsets.all(8.0))).existsOnce();

Implementation

@useResult
WidgetSelector<Container> whereMargin(MatchProp<EdgeInsetsGeometry> match) {
  return withDiagnosticProp<EdgeInsetsGeometry>('margin', match);
}