code: def _get_run_tag_info(mapping):
      """Returns a map of run names to a list of tag names.
  
      Args:
          mapping: a nested map `d` such that `d[run][tag]` is a time series
            produced by DataProvider's `list_*` methods.
  
      Returns:
          A map from run strings to a list of tag strings. E.g.
              {"loss001a": ["actor/loss", "critic/loss"], ...}
      """
      return {run: sorted(mapping[run]) for run in mapping}
  
imports: import collections
  import imghdr
  import json
  from werkzeug import wrappers
  from tensorboard import errors
  from tensorboard import plugin_util
  from tensorboard.backend import http_util
  from tensorboard.data import provider
  from tensorboard.plugins import base_plugin
  from tensorboard.plugins.histogram import metadata
  from tensorboard.plugins.image import metadata
  from tensorboard.plugins.metrics import metadata
  from tensorboard.plugins.scalar import metadata
label_desc: Use image node_id 4 for calling a global function with example usage: _get_run_tag_info(mapping) and returns: unknown