# File lib/dister/core.rb, line 144
    def appliance
      if @appliance.nil?
        begin
          appliance_id = self.options.appliance_id
          return nil if appliance_id.nil?
          @appliance = StudioApi::Appliance.find(appliance_id.to_i)
        rescue ActiveResource::BadRequest
          self.options.appliance_id = nil
          nil
        end
      else
        @appliance
      end
    end