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: manifestation.rb
    path of file: ./repos/enju_leaf/app/models
    
    the code of the file until where you have to start completion: class Manifestation < ApplicationRecord
  include EnjuCirculation::EnjuManifestation
  include EnjuSubject::EnjuManifestation
  include EnjuNdl::EnjuManifestation
  include EnjuNii::EnjuManifestation
  include EnjuLoc::EnjuManifestation
  include EnjuManifestationVi
    
  def to_hash(role: 'Guest')
    record = {
      manifestation_id: id,
      original_title: original_title,
      title_alternative: title_alternative,
      title_transcription: title_transcription,
      statement_of_responsibility: statement_of_responsibility,
      serial: serial,
      manifestation_identifier: manifestation_identifier,
      creator: creates.map{|create|
        if create.create_type
          "#{create.agent.full_name}||#{create.create_type.name}"
        else
          "#{create.agent.full_name}"
        end