code: def _is_nbexec_op(opdef):
      return opdef.main and opdef.main.lstrip().startswith(
          "guild.plugins.nbexec"
      )
  
imports: import ast
  import json
  import logging
  import os
  import re
  from guild import config
  from guild import guildfile
  from guild import model
  from guild import plugin
  from guild import python_util
  from guild import util
  from .None import flags_import_util
label_desc: Use image node_id 4 for calling a global function with example usage: _is_nbexec_op(opdef) and returns: unknown