GroupingColumnsConfig

Grouping-columns config widened to accept React render functions for groupHeaderRenderer and per-group renderer entries in columnGroups.

type GroupingColumnsConfig = Omit<CoreGroupingColumnsConfig, "groupHeaderRenderer" | "columnGroups"> & { columnGroups?: ColumnGroupDefinition[]; groupHeaderRenderer?: CoreGroupingColumnsConfig["groupHeaderRenderer"] | (args: Parameters<NonNullable<CoreGroupingColumnsConfig["groupHeaderRenderer"]>>) => ReactNode }