code: public static Response createLinksHandler(ParaObject pobj, String id2) {
  		try (final Metrics.Context context = Metrics.time(null, RestUtils.class, "links", "create")) {
  			if (id2 != null && pobj != null) {
  				String linkid = pobj.link(id2);
  				if (linkid == null) {
  					return getStatusResponse(Response.Status.BAD_REQUEST, "Failed to create link.");
  				} else {
  					return Response.ok(linkid, MediaType.TEXT_PLAIN_TYPE).build();
  				}
  			} else {
  				return getStatusResponse(Response.Status.BAD_REQUEST, "Parameters 'type' and 'id' are missing.");
  			}
  		}
  	}
docs: Handles requests to link an object to other objects.
  @param pobj the object to operate on
  @param id2 the id of the second object (optional)
  @return a Response