code: private RelationshipResolver getResolver(Class<?> type) {
  		RelationshipResolver resolver = typedResolvers.get(type);
  		return resolver != null ? resolver : globalResolver;
  	}
docs: Returns relationship resolver for given type. In case no specific type resolver is registered, global resolver
  is returned.
  @param type relationship object type
  @return relationship resolver or <code>null</code>