# File lib/ruote/storage/hash_storage.rb, line 176
    def purge!

      @h = %w[

        variables

        msgs
        expressions
        errors
        schedules
        configurations
        workitems

      ].each_with_object({}) { |k, h|
        h[k] = {}
      }

      @h['configurations']['engine'] = @options
    end