Placeholder column span

Hi, I have a question about placeholder headers.

I have an array of

ColumnDef

ColumnDef

, containing two simple accessor columns, followed by a group column. When rendering the first (top) header group, I get two "placeholder" headers (one for each ungrouped column), followed by the group header.

I would like/expect to get a single placeholder header, with

colSpan: 2

colSpan: 2

to span both of the ungrouped columns. I only want to render a single th element here, not two. Is this possible, without manually grouping the ungrouped columns?

I'm sorry if this is a stupid question, and thanks for reading.

Placeholder column span

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