code: public ResourceTransformerEntry resolveResourceTransformer(final PathAddress address, final PlaceholderResolver placeholderResolver) {
          return resolveResourceTransformer(address.iterator(), null, placeholderResolver);
      }
docs: Resolve a resource transformer for a given address.
  
  @param address the address
  @param placeholderResolver a placeholder resolver used to resolve children of a placeholder registration
  @return the resource transformer