old_contents: import phonenumbers
  
  from .base import Detector
  from ..filth import PhoneFilth
  
  
  class PhoneDetector(Detector):
      """Remove phone numbers from dirty dirty ``text`` using
      `python-phonenumbers
      <https://github.com/daviddrysdale/python-phonenumbers>`_, a port of a
      Google project to correctly format phone numbers in text.
  
      ``region`` specifies the best guess region to start with (default:
      ``"US"``). Specify ``None`` to only consider numbers with a leading
      ``+`` to be considered.
      """
      filth_cls = PhoneFilth
      region = 'US'
  
      def iter_filth(self, text):
          # create a copy of text to handle multiple phone numbers correctly
          for match in phonenumbers.PhoneNumberMatcher(text, self.region):
              yield PhoneFilth(
                  beg=match.start,
                  end=match.end,
                  text=match.raw_string,
              )
  
new_contents: import phonenumbers
  
  from typing import Optional
  
  from .base import Detector
  from ..filth import PhoneFilth
  
  
  class PhoneDetector(Detector):
      """Remove phone numbers from dirty dirty ``text`` using
      `python-phonenumbers
      <https://github.com/daviddrysdale/python-phonenumbers>`_, a port of a
      Google project to correctly format phone numbers in text.
  
      ``region`` specifies the best guess region to start with (default:
      ``"US"``). Specify ``None`` to only consider numbers with a leading
      ``+`` to be considered.
      """
      filth_cls = PhoneFilth
      name = 'phone'
  
      def __init__(self, region: str = 'US', **kwargs):
          super(PhoneDetector, self).__init__(**kwargs)
          self.region = region
  
      def iter_filth(self, text, document_name: Optional[str] = None):
          # create a copy of text to handle multiple phone numbers correctly
          for match in phonenumbers.PhoneNumberMatcher(text, self.region):
              yield PhoneFilth(
                  beg=match.start,
                  end=match.end,
                  text=match.raw_string,
                  detector_name=self.name,
                  document_name=document_name
              )
  
subject: add type annotations and pass needed args into the filth classes