Gather up to eight outputs of other blocks -- tables, images, JSON results, directories -- into one named directory with an index. Feeds a report (ai.report, viz.report_html). A bundle connected to a slot is flattened in.
Comma-separated names for the connected slots, in slot order, e.g. "plots,biomass_map,fit". Names must be identifiers; they become table names in a report's SQL. Blank names a member after its slot.