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: dwca.rb
    path of file: ./repos/mushroom-observer/app/classes/report
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Report
  # Darwin Core Archive format.
  class Dwca < ZipReport
    attr_acc
    
    def render
      path = Rails.public_path.join("dwca/gbif_meta.xml")
      content << ["meta.xml", path.read]
      content << ["observations.csv", observations.render]
      content << ["multimedia.csv", images.render]
      super
    end