# File lib/haml/util.rb, line 406
    def rails_safe_buffer_class
      # It's important that we check ActiveSupport first,
      # because in Rails 2.3.6 ActionView::SafeBuffer exists
      # but is a deprecated proxy object.
      return ActiveSupport::SafeBuffer if defined?(ActiveSupport::SafeBuffer)
      return ActionView::SafeBuffer
    end