feat: export col_info function #941
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Without this (I think) it is not possible to add new methods for other backends.
Explanation:
In
mlr3torchwe have some tasks that download data from the internet and they are wrapped in aDataBackendLazy.In order to still convert the
mlr_tasksdictionary to adata.table(without downloading the data) the column information is provided hard-coded and hence requires a customcol_infomethod.