class ViewModel::ActiveRecord::UpdateOperation::MutableReferencedCollection

def initialize(association_data, update_context, members, blame_reference)
  @association_data = association_data
  @update_context   = update_context
  @members          = members.dup
  @blame_reference  = blame_reference
  @orphaned_members = []
  @free_members_by_indirect_ref = @members.index_by(&:indirect_viewmodel_reference)
end