You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: issue_natures_exchanger.rb
    path of file: ./repos/ekylibre/app/exchangers/ekylibre
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Ekylibre
  class IssueNaturesExchanger < Acti
    
    def import
      s = Roo::OpenOffice.new(file)

      w.count = s.sheets.count

      s.each_with_pagename do |_name, sheet|
        sheet.parse(headers: true).each_with_index do |row, index|
          # Pass first row containing headers columns
          next if index.zero?

          IssueNature.find_or_create_by!(label: row['label'], nature: row['issue_natures'], category: row['category'])
        end
      end
    end