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Can't create NSMutableAttributedString from NSTextAttachment

I'm trying to use the initializator of NSMutableAttributedString :

NSMutableAttributedString(attachment: NSTextAttachment())

but I get an error:

Argument labels ' (attachment:) ' does not match any available overloads.

You should first create an NSAttributedString with an attachment and then initialize a mutable string from it:

let attrString = NSAttributedString(attachment: textAttachment)
let mutableAttrString = NSMutableAttributedString(attributedString: attrString)

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