def content
      return if licenses.nil? || licenses.empty?
      licenses.map do |license|
        if license.is_a?(String)
          license
        elsif license.respond_to?(:[])
          license["text"]
        end
      end.join
    end
def content
      return if licenses.nil? || licenses.empty?
      licenses.map do |license|
        if license.is_a?(String)
          license
        elsif license.respond_to?(:[])
          license["text"]
        end
      end.join
    end
Returns the content used to compare two licenses using normalization from
 `Licensee::CotentHelper`