code: public static Related by(Relationships.WellKnown relationship) {
          return new Related(null, relationship.name(), EntityRole.SOURCE);
      }
docs: Overloaded version of {@link #by(String)} that uses the
  {@link org.hawkular.inventory.api.Relationships.WellKnown} as the name of the relationship.
  
  @param relationship the type of the relationship
  @return a new "related" filter instance