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: promise.rb
    path of file: ./repos/rake/lib/rake
    
    the code of the file until where you have to start completion: # frozen_stri
    
    def work
      stat :attempting_lock_on, item_id: object_id
      if @mutex.try_lock
        stat :has_lock_on, item_id: object_id
        chore
        stat :releasing_lock_on, item_id: object_id
        @mutex.unlock
      else
        stat :bailed_on, item_id: object_id
      end