code: def _GetPossibleActionsUsageString(possible_actions):
      if possible_actions:
          return "<{actions}>".format(
              actions="|".join(possible_actions)
          )
      return None
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import collections
  import itertools
  import sys
  from fire import completion
  from fire import custom_descriptions
  from fire import decorators
  from fire import docstrings
  from fire import formatting
  from fire import inspectutils
  from fire import value_types
label_desc: Use image node_id 27 for calling a global function with example usage: _GetPossibleActionsUsageString(possible_actions) and returns: None, str