code: def _addoption_instance(self, option, shortupper=False):
      if not shortupper:
          for opt in option._short_opts:
              if opt[0] == "-" and opt[1].islower():
                  raise ValueError("lowercase shortoptions reserved")
      if self.parser:
          self.parser.processoption(option)
      self.options.append(option)
  
imports: import argparse
  import warnings
  import py
  import six
  from _pytest.config.exceptions import UsageError
label_desc: Use image node_id 4 for calling the OptionGroup obj's underlying member method code with example usage: obj._addoption_instance(option, shortupper) without return types