code: def _read_header(self, lines):
      for line in lines:
          assert line.startswith("@")
          stop = self._tag(line[1:])
  
          if stop:
              return True
  
      return False
  
imports: from datetime import datetime
  from distutils.util import strtobool
  from types import SimpleNamespace
  from typing import Dict
  import numpy
  from toolz import compose_left
  from gluonts import json
  from gluonts.exceptions import GluonTSDataError
label_desc: Use image node_id 3 for calling the TSFReader obj's underlying member method code with example usage: obj._read_header(lines) and returns: False, True