code: def _opref_lt(self, compare_to):
      return str(self) < str(compare_to)
  
file_path: guildai/guild/opref.py
imports: import collections
  import logging
  import os
  import re
  from guild import util
label_desc: Use image node_id 10 for calling a global function with example usage: _opref_lt(compare_to) and returns: unknown