class ViewModel::ActiveRecord::UpdateContext

def initialize
  @root_update_operations       = [] # The subject(s) of this update
  @referenced_update_operations = {} # data updates to other root models, referred to by a ref hash
  # Set of ViewModel::Reference used to assert only a single update is
  # present for each viewmodel
  @updated_viewmodel_references = Set.new
  # hash of { ViewModel::Reference => deferred UpdateOperation }
  # for linked partially-constructed node updates
  @worklist = {}
  @release_pool = ReleasePool.new
end