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

module Dsu
  module Services
    module MigrationVersion
      class HydratorService
        def initialize(migration_version
    
        def initialize(migration_version_hash:, options: {})
          raise ArgumentError, 'migration_version_hash is nil' if migration_version_hash.nil?

          unless migration_version_hash.is_a?(Hash)
            raise ArgumentError,
              "migration_version_hash is the wrong object type: \"#{migration_version_hash}\""
          end