code: def _str_extended_summary(self):
      if self["Extended Summary"]:
          return self["Extended Summary"] + [""]
      else:
          return []
  
imports: import inspect
  import textwrap
  import re
  import pydoc
  from collections.abc import Mapping
  import sys
label_desc: Use image node_id 19 for calling the NumpyDocString obj's underlying member method code with example usage: obj._str_extended_summary() and returns: unknown, list