anchor.diff:  
   ```
   -Dcom.killbill.datadog.enable=true
  --Dcom.killbill.datadog.apiKey=__Your-API-Key__
  +-Dcom.killbill.datadog.apiKey=Your-API-Key
   ```
   
   The API key to be added is the same one contained in the command you
  
positive.code: To authorize the sending of the Kill Bill metrics, it is necessary to
  edit two lines in this file:
  
   `/var/lib/tomcat/bin/setenv2.sh`.
  
     This file contains configuration information for `tomcat`, which manages the
  KillBill web applications.
  
  This is a small file. The two lines to be edited are:
  
negative.code: 
  == Single Tier and Multitier Implementations
  
  Several third party tools are available to manage and display Kill Bill's metrics of
  this type. One popular tool is https://www.datadoghq.com/[Datadog]. This
  package offers a low-cost option to monitor and display whatever metrics
  you may find useful from the Kill Bill collection, including metrics
  