code: def _get_end(self):
      current_pos = self.tell()
      self.seek(0, 2)
      length = self.tell()
      self.seek(current_pos, 0)
      return length
  
imports: import contextlib
  import io
  import os
  from uuid import uuid4
  import requests
  from .._compat import fields
label_desc: Use image node_id 2 for calling the CustomBytesIO obj's underlying member method code with example usage: obj._get_end() and returns: length