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Adds one NA-filled column per work item to the output data.table, using the correct storage type (NA_character_ or NA_real_) for each. The table is modified in place.

Usage

.initialize_output_columns(out, work_items)

Arguments

out

The output data.table (modified in place).

work_items

A list of work items from .build_work_items().

Value

invisible(NULL). Called for its side effects.