code: def has_bucket(bucket_name):
      """Return True if the bucket already exists in the global collection."""
      return GCS_BUCKETS.get(bucket_name) is not None
  
imports: import base64
  import error_response
  import hashlib
  import json
  import random
  import re
label_desc: Use image node_id 8 for calling a global function with example usage: has_bucket(bucket_name) and returns: unknown