code: def get_replacement_value(cfg, prop):
      value = (cfg or {}).get(prop)
      value = "nan" if value is None else value
      return get_inner_replacement_value(value)
  
imports: import re
  import numpy
  import pandas
  from six import string_types
  import dtale.global_state
  from dtale.column_builders import ReplaceColumnBuilder
  from dtale.utils import classify_type, find_dtype, dict_merge
label_desc: Use image node_id 2 for calling a global function with example usage: get_replacement_value(cfg, prop) and returns: get_inner_replacement_value