Maybe/app/models/account/syncable.rb

module Account::Syncable
  extend ActiveSupport::Concern

  class_methods do
    def sync(start_date: nil)
      all.each { |a| a.sync_later(start_date: start_date) }
    end
  end

  def syncing?
    syncs.syncing.any?
  end

  def sync_later(start_date: nil)
    AccountSyncJob.perform_later(self, start_date: start_date)
  end

  def sync(start_date: nil)
    Account::Sync.for(self, start_date: start_date).run
  end
end