NSMutableAttributedStringExtension.swift

extension NSMutableAttributedString {
    func replacingOccurrences(of item: String, with replacement: NSAttributedString) {
        guard let range: Range<String.Index> = self.string.range(of: item) else {
            return
        }
        
        let nsrange = NSRange(range, in: self.string)
        self.replaceCharacters(in: nsrange, with: replacement)
    }
}