code: public boolean isEquivalentTo(final Link other) {
          return
                  getRel().equals(other.getRel()) &&
                          getHref().equals(other.getHref()) &&
                          getType().equals(other.getType()) &&
                          getProfile().equals(other.getProfile());
      }
docs: Two links are considerered equivalent, if they have the same {@link #getRel() link-relation type} and are
  pointing to the {@link #getHref() same resource} in the same {@link #getType() representation} and
  {@link #getProfile() profile}.
  
  @param other other link
  @return true if the links are equivalent, false otherwise.