code: def get_full_stack_id(stack_id):
      return f"buildkite-{stack_id}-worker"
  
file_path: xgboost/tests/buildkite/infrastructure/worker-image-pipeline/create_worker_image_pipelines.py
imports: import argparse
  import copy
  import json
  import os
  import sys
  from urllib.request import urlopen
  import boto3
  import cfn_flip
  from metadata import IMAGE_PARAMS
  from common_blocks.utils import replace_stack, wait
label_desc: Use image node_id 3 for calling a global function with example usage: get_full_stack_id(stack_id) and returns: str, stack_id, str