```ruby
module ActiveAdminImport
  class ImportResult
    attr_reader :failed, :total

    def initialize
      @failed = []
      @total = 0
    end

    def add(result, qty)
      @failed += result.failed_instances
      @total  += qty
    end

    def imported_qty
      total - failed.count
    end

    def has_imported?
      imported_qty > 0
    end

    def has_failed?
      @failed.any?
    end

    def empty?
      total == 0
    end

    def failed_message(limit: nil)
      limit ||= failed.count
      failed.first(limit).map{|record|
        errors = record.errors
        (errors.full_messages.zip errors.keys.map{|k| record.send k}).map{|ms| ms.join(' - ')}.join(', ')
      }.join(" ; ")
    end
  end
end
```

Remove keyword argument to make Ruby 1.9 compatible
user
```ruby
module ActiveAdminImport
  class ImportResult
    attr_reader :failed, :total

    def initialize
      @failed = []
      @total = 0
    end

    def add(result, qty)
      @failed += result.failed_instances
      @total  += qty
    end

    def imported_qty
      total - failed.count
    end

    def has_imported?
      imported_qty > 0
    end

    def has_failed?
      @failed.any?
    end

    def empty?
      total == 0
    end

    def failed_message(options = {})
      limit = options.fetch(:limit, failed.count)
      failed.first(limit).map{|record|
        errors = record.errors
        (errors.full_messages.zip errors.keys.map{|k| record.send k}).map{|ms| ms.join(' - ')}.join(', ')
      }.join(" ; ")
    end
  end
end
```
assistant