code: def _accept(prefix):
      # Magic number was taken from https://en.wikipedia.org/wiki/JPEG
      return prefix[:3] == b"\xFF\xD8\xFF"
  
imports: from __future__ import annotations
  import array
  import io
  import math
  import os
  import struct
  import subprocess
  import sys
  import tempfile
  import warnings
  from .None import Image, ImageFile
  from ._binary import i16be
  from ._binary import i32be
  from ._binary import o8
  from ._binary import o16be
  from .JpegPresets import presets
label_desc: Use image node_id 6 for calling a global function with example usage: _accept(prefix) and returns: unknown