code: public SkinnyUUID getUUID(Namespace namespace, String value)
              throws EquivalencerException {
          loadEquivalencingEngine();
          final Parameter p = new Parameter(namespace, value);
  
          try {
              return paramEquivalencer.getUUID(p);
          } catch (InvalidArgument e) {
              //TODO change when paramEquivalencer exception is changed
              return null;
          } catch (Exception e) {
              final String fmt = "Unable to find UUID for '%s'";
              final String msg = format(fmt, p.toBELShortForm());
              throw new EquivalencerException(msg, e);
          }
      }
docs: Obtain the equivalence UUID for the given {@link Namespace namespace} and value.
  @param namespace {@link Namespace namespace}, must not be null
  @param value {@link String value}, must not be null
  @return {@link SkinnyUUID UUID} representing the value or <code>null</code> if the
  namespace/value combination has no equivalents. null is also returned if the
  namespace has no equivalences defined.
  @throws EquivalencerException Thrown if an exception occurs finding all
  equivalences