All downstream users treats titleLen == 0 as this item (and children) doesn't exist but it is kind of valid to have a outline title to be empty string. In order to don't break downstreams, do like firefox's pdf component and replace with a dash.
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All downstream users treats titleLen == 0 as this item (and children) doesn't exist but it is kind of valid to have a outline title to be empty string. In order to don't break downstreams, do like firefox's pdf component and replace with a dash.