anchor.diff:   Q: should this really include all values?
   * especially Garbage collector stuff is pretty convoluted
   * List of datasources with connections in use (list can be empty)
  -* 
  +* ...
   
   Values from the MBean server are encoded with `MBean-Name/attribute[#field]` name to retrieve a single attribute.
   
  
positive.code: 
  Metadata SHOULD support caching via cache control headers and SHOULD reply with a 304 Not Modified response accordingly.
  
  == Required metrics
  
  Required metrics is a list of metrics that all vendors need to implement. They are exposed under `/metrics/base`
  
  The following is a list of required metrics if the application uses the data. E.g. if the application does not use any data source, then there will be no data sources listed.
  
  
negative.code: = Metrics via HTTP endpoints
  
  
  * Authors: https://github.com/pilhuhn[Heiko W. Rupp], https://github.com/raymondlam[Raymond Lam], https://github.com/Channyboy[David Chan]
  
  
  
  