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: migration_version.rb
    path of file: ./repos/dsu/lib/dsu/models
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require_relative '../crud/json_file'
require_relative '
    
      def initialize(version: nil, options: {})
        super(migration_version_path)

        FileUtils.mkdir_p migration_version_folder

        @options = options || {}
        @version = version and return if version

        file_hash = if exist?
          read do |migration_version_hash|
            hydrated_hash =
              Services::MigrationVersion::HydratorService.new(migration_version_hash: migration_version_hash).call
            migration_version_hash.merge!(hydrated_hash)
          end
        end