code: def _width(self):
      return token_list_width(self.in_prompt_tokens())
  
imports: from __future__ import print_function
  from pygments.token import Token
  import sys
  from IPython.core.displayhook import DisplayHook
  from prompt_toolkit.layout.utils import token_list_width
label_desc: Use image node_id 3 for calling the Prompts obj's underlying member method code with example usage: obj._width() and returns: token_list_width