module ViewModel::Controller

def parse_bulk_update
  data, references = parse_viewmodel_updates
  ViewModel::Schemas.verify_schema!(ViewModel::Schemas::BULK_UPDATE, data)
  updates_by_parent =
    data.fetch(ViewModel::BULK_UPDATES_ATTRIBUTE).each_with_object({}) do |parent_update, acc|
      parent_id = parent_update.fetch(ViewModel::ID_ATTRIBUTE)
      update    = parent_update.fetch(ViewModel::BULK_UPDATE_ATTRIBUTE)
      acc[parent_id] = update
    end
  return updates_by_parent, references
end