code: public String external(ExternalCondition condition) {
          String description = "AlerterId: " + condition.getAlerterId();
          description += " DataId: " + condition.getDataId();
          description += " Expression: " + condition.getExpression();
          return description;
      }
docs: Create a description for an ExternalCondition object.
  
  @param condition the condition
  @return a description to be used on email templates