Method GetGroupBySqlPreviewAsync(long, IEnumerable<GroupFieldRequest>, IEnumerable<AggregateRequest>, FilterExpression?)
Pro: SQL Preview for GroupBy with FilterExpression (preferred).
public Task<string> GetGroupBySqlPreviewAsync(long schemeId, IEnumerable<GroupFieldRequest> groupFields, IEnumerable<AggregateRequest> aggregations, FilterExpression? filter)