public SelectQuery <TPoco> SynteticColumn(string column, out QueryIdentifier identifier)
{
var selectableQueryPart = ContainerObject.SearchLast <SelectTableQueryPart>();
var columnInfo = new ColumnInfo(column, selectableQueryPart.Alias, ContainerObject);
columnInfo.ColumnIdentifierEntry = ContainerObject.CreateColumnAlias(column);
identifier = columnInfo.ColumnIdentifierEntry;
selectableQueryPart._columns.Add(columnInfo);
return(this);
}