code: ContentMatcher nextMatcher(Conjunction selector, ContentMatcher oldMatcher) {
      return Factory.createMatcher(ordinalPosition, selector, oldMatcher);
    }
docs: Determine the next matcher to which a put operation should be delegated.
  Except when cacheing is active, this method delegates to Factory.createMatcher.
  It is overridden in EqualityMatcher to wrap newly created Matchers in a
  CacheingMatcher when appropriate
  
  @param selector
  @param oldMatcher