docs: def xpath_pick_one(self, xpaths):
  		"""
  		Try each of the xpaths successively until
  		a single element is found. If no xpath succeeds
  		then raise the last UnexpectedContentException caught.
  		"""
  		for xpathi, xpath in enumerate(xpaths):
  			try:
  				return self.xpath(xpath, [1, 1])[0]
  			except UnexpectedContentException as e:
  				if xpathi == len(xpaths) - 1:
  					raise