docs: function (evt) {
      var aggregateId = '';
      if (dotty.exists(evt, this.definition.aggregateId)) {
        aggregateId = dotty.get(evt, this.definition.aggregateId);
      }
  
      var aggregate = '';
      if (dotty.exists(evt, this.definition.aggregate)) {
        aggregate = dotty.get(evt, this.definition.aggregate);
      }
  
      var context = '';
      if (dotty.exists(evt, this.definition.context)) {
        context = dotty.get(evt, this.definition.context);
      }
  
      return context + aggregate + aggregateId;
    }