All engines now pass extras as an output from forge$clean and as an input to forge$process
The recipe engine now returns any non-standard role columns (anything but "predictor" or "outcome" columns) as a list of tibbles in extras$roles. Each role gets its own slot, so you'd have extras$roles$<role1> which would hold a tibble of columns with that role.
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Closes #76
extras
as an output fromforge$clean
and as an input toforge$process
extras$roles
. Each role gets its own slot, so you'd haveextras$roles$<role1>
which would hold a tibble of columns with that role.