# File ../../auditor/lib/kasp_auditor/key_tracker.rb, line 122
    def initialize(working_directory, zone_name, parent, config, enforcer_interval, validity)
      @working = working_directory
      @zone = zone_name
      @parent  = parent
      @config = config
      @enforcer_interval = enforcer_interval
      @last_soa_serial = nil
      @initial_timestamp = Time.now.to_i
      @validity = validity
      @cache = load_tracker_cache()
    end