ios - PDFKit Swapping Content material of Annotation

Can the textual content (i.e. contents) of a FreeText annotation be modified in PDFKit with out deleting an annotation / constructing a brand new annotation?

The next snippet doesn't change an annotation's contents when viewing in a PDFView:

let url = Bundle.fundamental.url(forResource: "Take a look at", withExtension: "pdf")!
let doc = PDFDocument(url: url)!

for index in 0..

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