lib/cocina/models/request_dro_structural.rb in cocina-models-0.63.0 vs lib/cocina/models/request_dro_structural.rb in cocina-models-0.63.1

@@ -1,12 +1,12 @@
 # frozen_string_literal: true
 
 module Cocina
   module Models
     class RequestDROStructural < Struct
-      attribute :contains, Types::Strict::Array.of(RequestFileSet).default([])
-      attribute :hasMemberOrders, Types::Strict::Array.of(Sequence).default([])
-      attribute :isMemberOf, Types::Strict::Array.of(Druid).default([])
+      attribute :contains, Types::Strict::Array.of(RequestFileSet).default([].freeze)
+      attribute :hasMemberOrders, Types::Strict::Array.of(Sequence).default([].freeze)
+      attribute :isMemberOf, Types::Strict::Array.of(Druid).default([].freeze)
       attribute :hasAgreement, Types::Strict::String.meta(omittable: true)
     end
   end
 end