collection problem

gistfile1.txt

col.class.ancestors
=> [Dor::Collection,
 Dor::Releaseable,
 Dor::Set,
 #<Module:0x0000000006517678>,
 #<Module:0x000000000661dea0>,
 #<Module:0x000000000661eb48>,
 #<Module:0x000000000661f430>,
 Dor::Publishable,
 Dor::Abstract,
 Dor::Processable,
 Dor::Versionable,
 Dor::Describable,
 Dor::Rightsable,
 #<Module:0x0000000006a76038>,
 #<Module:0x0000000006a716a0>,
 #<Module:0x0000000006a71b00>,
 #<Module:0x0000000006a651e8>,
 #<Module:0x0000000006a546e0>,
 Dor::Governable,
 Dor::Eventable,
 #<Module:0x00000000068e9d78>,
 Dor::Identifiable,
 ActiveFedora::Base,
 ActiveFedora::RDF::Identifiable,
 ActiveFedora::ReloadOnSave,
 ActiveFedora::FedoraAttributes,
 ActiveFedora::Core,
 ActiveFedora::Serialization,
 ActiveModel::Serializers::JSON,
 ActiveModel::Serialization,
 ActiveFedora::Attributes::Serializers,
 ActiveFedora::Attributes,
 #<Module:0x0000000006891df8>,
 ActiveModel::Dirty,
 ActiveModel::AttributeMethods,
 ActiveFedora::Reflection,
 ActiveFedora::NestedAttributes,
 ActiveFedora::AutosaveAssociation,
 ActiveFedora::Associations,
 ActiveFedora::Datastreams,
 ActiveModel::Validations::Callbacks,
 ActiveFedora::Callbacks,
 ActiveFedora::Validations,
 ActiveModel::Validations::HelperMethods,
 ActiveSupport::Callbacks,
 ActiveModel::Validations,
 ActiveModel::Conversion,
 ActiveFedora::Indexing,
 ActiveFedora::Scoping::Named,
 ActiveFedora::Scoping::Default,
 ActiveFedora::Scoping,
 ActiveFedora::Persistence,
 ActiveFedora::Sharding,
 ActiveFedora::SemanticNode,
 ActiveSupport::ToJsonWithActiveSupportEncoder,
 Object,
 PP::ObjectMixin,
 Delayed::MessageSending,
 JSON::Ext::Generator::GeneratorMethods::Object,
 ActiveSupport::Tryable,
 ActiveSupport::Dependencies::Loadable,
 Kernel,
 BasicObject]