code: private Link annotationToLink(Siren4JLink linkAnno, EntityContext context) {
          LinkBuilder builder = LinkBuilder.newInstance().setRelationship(linkAnno.rel()).setHref(linkAnno.href());
          if (StringUtils.isNotBlank(linkAnno.title())) {
              builder.setTitle(linkAnno.title());
          }
          if (ArrayUtils.isNotEmpty(linkAnno.linkClass())) {
              builder.setComponentClass(linkAnno.linkClass());
          }
          return builder.build();
      }
docs: Convert a link annotation to an actual link. The href will not be resolved in the instantiated link, this will need
  to be post processed.
  
  @param linkAnno assumed not <code>null</code>.
  @return new link, never <code>null</code>.