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: rollbar_generator.rb
    path of file: ./repos/rollbar-gem/lib/generators/rollbar
    
    the code of the file until where you have to start completion: require 'rails/generators'
require 'rails/generators/named_base'
require 'generators/rollbar/rollbar_ge
    
      def create_initializer
        say 'creating initializer...'
        if access_token_configured?
          say "It looks like you've already configured Rollbar."
          say 'To re-create the config file, remove it first: ' \
            'config/initializers/rollbar.rb'
          exit
        end