class_docstr: Provide other keywords to the sub-parser constructor.
      
code: def __call__(self, func):
      func = super(kwds, self).__call__(func)
      func.argcmd_kwds = self.kwds
      return func
  
imports: import argparse
  import re
  from IPython.core.error import UsageError
  from IPython.utils.decorators import undoc
  from IPython.utils.process import arg_split
  from IPython.utils.text import dedent
label_desc: Use image node_id 2 for calling the kwds obj's underlying member method code with example usage: obj.__call__(func) and returns: func