code: public GroupName getGroupName(@NonNull SimpleGroupPath prefixPath, @NonNull Map<String, MetricValue> extraTags) {
          return getGroupName(prefixPath.getPath(), extraTags);
      }
docs: Create a GroupName from this NamedResolverMap.
  
  @param prefixPath Additional path elements to put in front of the
  returned path.
  @param extraTags Additional tags to put in the tag set. The extraTags
  argument will override any values present in the NamedResolverMap.
  @return A group name derived from this NamedResolverMap and the supplied
  arguments.