@ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
   @JoinTable(name = "Prf_tag", uniqueConstraints = @UniqueConstraint(
         columnNames = {"tag", "user" }),
         joinColumns = { @JoinColumn(name = "user", nullable = false, updatable = false) },
         inverseJoinColumns = { @JoinColumn(name = "tag", nullable = false, updatable = false) })
   @org.hibernate.annotations.Cascade(org.hibernate.annotations.CascadeType.DELETE_ORPHAN)
   public Set<Tag> getTagsSet() {
      return this.tagsSet;
   }