-- use this if you are sure column is in the store, it's incomplete (returns nothing for Nothing) so - DANGEROUS!!!
checkColType' :: Text -> ColumnMemoryStore -> SupportedTypes
checkColType' nm cms = 
    let c = checkColType nm cms
    in case c of
        Just t -> t

-- return any unboxed columns - specific definitions below
checkColType' :: Text -> ColumnMemoryStore -> SupportedTypes
checkColType' nm cms = 
    let c = checkColType nm cms
    in case c of
        Just t -> t

-- return any unboxed columns - specific definitions below
checkColType' nm cms = 
    let c = checkColType nm cms
    in case c of
        Just t -> t

-- return any unboxed columns - specific definitions below