Type '({ title: string; dataIndex: string; key: string; width: string; sorter?: undefined; align?: undefined; } | { title: string; dataIndex: string; key: string; width: string; sorter: (a: { size_bytes: number; }, b: { ...; }) => number; align: string; } | { ...; } | { ...; })[]' is not assignable to type '(ColumnGroupType<{ key: string; file: Element; size: string; size_bytes: number; count: number; created_at: string; created_at_unix: number; actions: Element; }> | ColumnType<...>)[]'.

'generating' is declared but its value is never read.