mutablePage method

Future<UPdfDict?> mutablePage(
  1. int index
)

Implementation

Future<UPdfDict?> mutablePage(int index) async {
  final UPdfPage? page = await document.page(index);
  final UPdfRef? ref = page?.ref;
  if (page == null || ref == null) return null;
  final Object? staged = _changed[ref.number];
  if (staged is UPdfDict) return staged;
  final UPdfDict copy = page.dict.copy();
  put(ref.number, copy);
  return copy;
}