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: specification.rb
    path of file: ./repos/stealth/lib/stealth/flow
    
    the code of the file until where you have to start completion: # coding: utf-8
# frozen_string_literal: true

module Stealth
  module Flow
    class Specification
      attr_reader :flow_name
      attr_accessor :states, :initial_state

      def initialize(flow_name, &s
    
        def get_fail_or_redirect_state(specified_state)
          if specified_state.present?
            session = Stealth::Session.new

            if Stealth::Session.is_a_session_string?(specified_state)
              session.session = specified_state
            else
              session.session = Stealth::Session.canonical_session_slug(
                flow: flow_name,
                state: specified_state
              )
            end