code: def start(self):
      self.kernel_spec_manager.ensure_native_kernel = False
      spec_paths = self.kernel_spec_manager.find_kernel_specs()
      missing = set(self.spec_names).difference(set(spec_paths))
      if missing:
          self.exit(
              "Couldn't find kernel spec(s): %s" % ", ".join(missing)
          )
  
      if not self.force:
          print("Kernel specs to remove:")
          for name in self.spec_names:
              print("  %s\t%s" % (name.ljust(20), spec_paths[name]))
          answer = raw_input(
              "Remove %i kernel specs [y/N]: " % len(self.spec_names)
          )
          if not answer.lower().startswith("y"):
              return
  
      for kernel_name in self.spec_names:
          try:
              path = self.kernel_spec_manager.remove_kernel_spec(
                  kernel_name
              )
          except OSError as e:
              if e.errno == errno.EACCES:
                  print(e, file=sys.stderr)
                  print("Perhaps you want sudo?", file=sys.stderr)
                  self.exit(1)
              else:
                  raise
          self.log.info("Removed %s", path)
  
imports: from __future__ import print_function
  import errno
  import os.path
  import sys
  import json
  from traitlets.config.application import Application
  from jupyter_core.application import JupyterApp, base_flags, base_aliases
  from traitlets import Instance, Dict, Unicode, Bool, List
  from .None import __version__
  from .kernelspec import KernelSpecManager
label_desc: Use image node_id 3 for calling the RemoveKernelSpec obj's underlying member method code with example usage: obj.start() without return types