code: def require_exp_directory(f):
      
      error = "The current directory is not a valid Dallinger experiment."
  
      @wraps(f)
      def wrapper(**kwargs):
          if not verify_directory(kwargs.get("verbose")):
              raise click.UsageError(error)
          return f(**kwargs)
  
      return wrapper
docs: Decorator to verify that a command is run inside a valid Dallinger
      experiment directory.