code: def _parse_stack_frames_blob_key(blob_key):
      """Parse the BLOB key for source file list.
  
      Args:
        blob_key: The BLOB key to parse. By contract, it should have the format:
         `${STACK_FRAMES_BLOB_TAG_PREFIX}_` +
         `${stack_frame_id_0}_..._${stack_frame_id_N}.${run_id}`
  
      Returns:
        - run ID
        - The stack frame IDs as a tuple of strings.
      """
      key_body, run = blob_key.split(".", 1)
      key_body = key_body[len(STACK_FRAMES_BLOB_TAG_PREFIX) + 1 :]
      stack_frame_ids = key_body.split("_")
      return run, stack_frame_ids
  
imports: import json
  from tensorboard.data import provider
  from tensorboard.plugins.debugger_v2 import debug_data_multiplexer
label_desc: Use image node_id 20 for calling a global function with example usage: _parse_stack_frames_blob_key(blob_key) and returns: run,  stack_frame_ids