# File lib/backup/database/mongodb.rb, line 49
      def initialize(model, &block)
        super(model)

        @only_collections   ||= Array.new
        @additional_options ||= Array.new
        @ipv6               ||= false
        @lock               ||= false

        instance_eval(&block) if block_given?

        @mongodump_utility  ||= utility(:mongodump)
        @mongo_utility      ||= utility(:mongo)
      end