class_docstr: Statemachine that receives :class:`KeyPress` instances and according to the
  key bindings in the given :class:`KeyBindings`, calls the matching handlers.
  
  ::
  
      p = KeyProcessor(key_bindings)
  
      # Send keys into the processor.
      p.feed(KeyPress(Keys.ControlX, ''))
      p.feed(KeyPress(Keys.ControlC, '')
  
      # Process all the keys in the queue.
      p.process_keys()
  
      # Now the ControlX-ControlC callback will be called if this sequence is
      # registered in the key bindings.
  
  :param key_bindings: `KeyBindingsBase` instance.
docstr: Send SIGINT. Immediately call the SIGINT key handler.
docstr_tok: ["Send","SIGINT",".","Immediately","call","the","SIGINT","key","handler","."]
code: def send_sigint(self) -> None:
      """
      Send SIGINT. Immediately call the SIGINT key handler.
      """
      self.feed(KeyPress(key=Keys.SIGINT), first=True)
      self.process_keys()
  
imports: from __future__ import annotations
  import weakref
  from asyncio import Task, sleep
  from collections import deque
  from typing import TYPE_CHECKING, Any, Generator
  from prompt_toolkit.application.current import get_app
  from prompt_toolkit.enums import EditingMode
  from prompt_toolkit.filters.app import vi_navigation_mode
  from prompt_toolkit.keys import Keys
  from prompt_toolkit.utils import Event
  from .key_bindings import Binding, KeyBindingsBase
label_desc: Use image node_id 14 for calling the KeyProcessor obj's underlying member method code with example usage: obj.send_sigint() without return types