code: def is_single_value(value):
      # some functions may specify a bjam signature
      # that is a string type, but still allow a
      # PropertySet to be passed in
      return safe_isinstance(
          value, (basestring, type(None)), "PropertySet"
      )
  
imports: import bjam
  import re
  import types
  from itertools import groupby
label_desc: Use image node_id 5 for calling a global function with example usage: is_single_value(value) and returns: safe_isinstance