private static IFilter GetFinalFilter(this TreeContext context, IFilter filter)
{
var inversionDiag = context.IsCvFilter(filter)
? context.Store.CollectionInversions.SafeGet(filter.Dependencies.First().Token)
: context.Store.FilterInversions.SafeGet(filter.FilterInfo.FilterToken);
return(inversionDiag != null ? new Inverter(filter, new FilterInfo(context.Store.NextId, inversionDiag)) : filter);
}