Help(fastai.untar_data) is not working?

I was working on implementing RNN on a dataset as taught by Rachel in the NLP course , which is present inside fast AI itself.

and tried to use this function untar_data , however this is the error i receive
AttributeError: module 'fastai' has no attribute 'untar_data'
. would like to know how to resolve this error

Well got it working.
had to update the fast ai module
from fastai.text.all import *
made it work