proxy_class (MongoMapper::Plugins::Associations::OneAssociation)

# File lib/mongo_mapper/plugins/associations/one_association.rb, line 10
        def proxy_class
          @proxy_class ||=
            if klass.embeddable?
              polymorphic? ? OneEmbeddedPolymorphicProxy : OneEmbeddedProxy
            elsif as?
              OneAsProxy
            else
              OneProxy
            end
        end