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: routes.rb
    path of file: ./repos/entangled/lib/entangled
    
    the code of the file until where you have to start completion: module ActionDispatch::Routing
  class Mapper
    private

    # Generates five routes that all use GET requests.
    # 
    
    def infer_routes(options)
      if options.any?
        if options[:only]
          if options[:only].is_a?(Symbol)
            routes = [options[:only]]
          elsif options[:only].is_a?(Array)
            routes = options[:only]
          end