docs: def _text_filter_input(self, input_gen):
          """
          Filters out the text input line by line to avoid parsing and processing
          metrics we know we don't want to process. This only works on `text/plain`
          payloads, and is an INTERNAL FEATURE implemented for the kubelet check
          :param input_get: line generator
          :output: generator of filtered lines
          """
          for line in input_gen:
              for item in self._text_filter_blacklist:
                  if item in line:
                      break
              else:
                  # No blacklist matches, passing the line through
                  yield line