Reconstructs the portable DGF that was embedded in a stable CSV by
[write_stable_csv()].
Arguments
- x
The result of [read_stable_csv()], or a path to a stable CSV.
Value
The embedded DGF as a data frame (portable families only - no
`rg_*`), or `NULL` if the file carries no DGF payload.
See also
[read_stable_csv()], [write_stable_csv()]