code: def close(self, all_fds=False):
      self.closing = True
      for fd in list(self.handlers):
          fileobj, handler_func = self.handlers[fd]
          self.remove_handler(fd)
          if all_fds:
              self.close_fd(fileobj)
      if self.close_loop:
          self.asyncio_loop.close()
  
imports: from __future__ import absolute_import, division, print_function
  import functools
  import tornado.concurrent
  from tornado.gen import convert_yielded
  from tornado.ioloop import IOLoop
  from tornado import stack_context
label_desc: Use image node_id 2 for calling the BaseAsyncIOLoop obj's underlying member method code with example usage: obj.close(all_fds) without return types