Labels the pages from startPageIndex to the next range: sets or replaces the range starting there.
public PdfPageLabelRange SetRange(int startPageIndex, PdfPageLabelStyle style, string? prefix = null, int firstNumber = 1)
The index of the range's first page, from 0. It need not be a page of the document yet.
How the numeric portion is written; None for the prefix alone.
The text before the numeric portion, or null for none.
The number of the range's first page, 1 or more.
ISO 32000-2 §12.4.2, Table 161 (PDF 1.3), and §7.9.7: a page label dictionary holding only S, P and St
where they differ from the defaults, stored in the number tree under startPageIndex with the tree's
Limits kept correct. A mutation: no read may run concurrently with it.