Succeed helper outside of the ActionView

[Kayne]

Using succeed helper crashes during rendering outside of the ActionView. The very simple example in rails console:

content = "= succeed '.' do\r\n  blablabla1\r\n  blablabla2"
template = Haml::Template.new { content }
template.render

raises:

NoMethodError: undefined method `succeed' for #<Object:0x00000001084ef738>
from (__TEMPLATE__):1:in `__tilt_84380'

Looks like succeed helper is not accessible when using render method directly? Which does make sense, since succeed is a helper accessible in ActionView. So the question is… How to use HAML template which uses succeed helper but I need to render template in model/controller - outside of the ActionView?