public static AsyncMappingExpression <TSource, TDestination> Async <TSource, TDestination>(this IMappingExpressionBase <TSource, TDestination, IMappingExpression <TSource, TDestination> > mapping) => new AsyncMappingExpression <TSource, TDestination>(mapping);
internal AsyncMappingExpression(IMappingExpressionBase <TSource, TDestination, IMappingExpression <TSource, TDestination> > mapping) { _mapping = mapping; }