/**
  * Retrieves representation of an instance of fr.epsi.i4.NewsletterResource
  *
  * @param id
  * @return an instance of java.lang.String
  */
 @GET
 @Path("/newsletters/receiver/{id}")
 @Produces(MediaType.APPLICATION_JSON)
 public String getNewslettersByReceiverId(@PathParam("id") int id) {
   return WSRestNewsletter.getNewslettersByReceiverId(id);
 }