How to use the pytube.extract.is_age_restricted function in pytube

def test_age_restricted(age_restricted):
    assert extract.is_age_restricted(age_restricted['watch_html'])

def prefetch(self):
		"""Eagerly download all necessary data.

		Eagerly executes all necessary network requests so all other
		operations don't does need to make calls outside of the interpreter
		which blocks for long periods of time.

		:rtype: None

		"""
		self.watch_html = request.get(url=self.watch_url)
		if '

def prefetch(self):
        """Eagerly download all necessary data.

        Eagerly executes all necessary network requests so all other
        operations don't does need to make calls outside of the interpreter
        which blocks for long periods of time.

        :rtype: None

        """
        self.watch_html = request.get(url=self.watch_url)
        if '

def prefetch(self):
        """Eagerly download all necessary data.

        Eagerly executes all necessary network requests so all other
        operations don't does need to make calls outside of the interpreter
        which blocks for long periods of time.

        :rtype: None

        """
        self.watch_html = request.get(url=self.watch_url)
        if '