updateDocumentMeta method
Sets document metadata (invoked by the viewer).
Implementation
void updateDocumentMeta({
int? currentPage,
int? totalPages,
List<DocTocItem>? toc,
}) {
if (currentPage != null) _currentPage = currentPage;
if (totalPages != null) _totalPages = totalPages;
if (toc != null) _tableOfContents = toc;
_notify();
}