docs: def search(self, regex=None, spec=None, **kwargs):
          """Search for packages."""
          cmd_list = ['search', '--json']
  
          if regex and spec:
              raise TypeError('conda search: only one of regex or spec allowed')
  
          if regex:
              cmd_list.append(regex)
  
          if spec:
              cmd_list.extend(['--spec', spec])
  
          if 'platform' in kwargs:
              cmd_list.extend(['--platform', kwargs.pop('platform')])
  
          cmd_list.extend(
              self._setup_install_commands_from_kwargs(
                  kwargs,
                  ('canonical', 'unknown', 'use_index_cache', 'outdated',
                   'override_channels')))
  
          return self._call_and_parse(cmd_list,
                                      abspath=kwargs.get('abspath', True))