code: def combine_title_text_id(ctx, use_title):
      return (
          (ctx["title"], ctx["text"], ctx.get("id", "NULL"))
          if use_title
          else (ctx["text"], ctx.get("id", "NULL"))
      )
  
file_path: pytext/pytext/data/sources/dense_retrieval.py
imports: import json
  import random
  from typing import List, Optional
  from pytext.data.sources.data_source import DataSource, generator_property
  from pytext.utils.file_io import PathManager
label_desc: Use image node_id 1 for calling a global function with example usage: combine_title_text_id(ctx, use_title) and returns: unknown