# File lib/backports/2.2.0/string/unicode_normalize.rb, line 6
      def unicode_normalize(form = :nfc)
        require 'backports/tools/normalize.rb' unless defined? UnicodeNormalize
        ## The following line can be uncommented to avoid repeated checking for
        ## UnicodeNormalize. However, tests didn't show any noticeable speedup
        ## when doing this. This comment also applies to the commented out lines
        ## in String#unicode_normalize! and String#unicode_normalized?.
        # String.send(:define_method, :unicode_normalize, ->(form = :nfc) { UnicodeNormalize.normalize(self, form) } )
        UnicodeNormalize.normalize(self, form)
      end