code: def base_key(
      suffix: str, prefix: Optional[str] = DEFAULT_PREFIX
  ) -> str:
      """Creates a base key from a prefix and a suffix."""
      return "%s/%s" % (prefix, suffix)
  
imports: from typing import Optional
label_desc: Use image node_id 1 for calling a global function with example usage: base_key(suffix, prefix) and returns: unknown