return this.matchingRuleRegistry.lookup( equalityId );
if ( equalityId != null ) { return this.matchingRuleRegistry.lookup( equalityId ); }  if ( superiorId != null ) { return getSuperior().getEquality(); }  return null;
        public MatchingRule getEquality() throws NamingException        {            return this.matchingRuleRegistry.lookup( equalityId );        }