anchor.diff:  
   [source]
   ----
  -public enum MpMUnit {
  +public enum MetricUnit {
     /** Dummy to say that this has no unit */
     NONE ("none"),
   
  
positive.code: === Metric Registry
  <TO DO>
  
  === Exposing metrics via REST API
  
  Data is exposed via REST over http under the `/metrics` base path in two default data formats for `GET` requests:
  
negative.code:   @JsonInclude(JsonInclude.Include.NON_NULL)
    private String tags;
  
    public Metadata(String name, MpMType type, MpMUnit unit) {
      this.name = name;
      this.type = type;
      this.unit = unit;
  