docs: function envelope(service_name){
  
      var anchor = this;
  
      anchor._is_a = 'bbop-service-envelope';
  
      // Start the timer.
      anchor._start_time = second_count();
  
      // Theoretical good result frame.
      anchor._envelope = {
  	service: 'n/a',
  	status: 'success',
  	arguments: {},
  	comments: [],
  	data: {}
      };
  
      //
      if( service_name && typeof(service_name) === 'string' ){
  	anchor._envelope['service'] = service_name;
      }
  }