code: def is_external(value):
      return isinstance(value, dict) and "uri" in value.keys()
  
imports: from __future__ import absolute_import
  import re
  import sys
  import copy
  import logging
  from .None import tools
  from datetime import date, datetime
  import enum
  import six
label_desc: Use image node_id 4 for calling a global function with example usage: is_external(value) and returns: unknown