code: func (h *hawkularSink) descriptorToDefinition(md *core.MetricDescriptor) metrics.MetricDefinition {
  	tags := make(map[string]string)
  	// Postfix description tags with _description
  	for _, l := range md.Labels {
  		if len(l.Description) > 0 {
  			tags[l.Key+descriptionTag] = l.Description
  		}
  	}
  
  	if len(md.Units.String()) > 0 {
  		tags[unitsTag] = md.Units.String()
  	}
  
  	tags[descriptorTag] = md.Name
  
  	hmd := metrics.MetricDefinition{
  		ID:   md.Name,
  		Tags: tags,
  		Type: heapsterTypeToHawkularType(md.Type),
  	}
  
  	return hmd
  }
docs: // Transform the MetricDescriptor to a format used by Hawkular-Metrics