class_docstr: Handles launching, suspending signals, and potentially dealing with terminal issues.
code: def _stop_all(cls):
      if cls._STARTED_INSTANCE:
          cls._STARTED_INSTANCE.stop()
  
imports: import atexit
  import abc
  import errno
  import logging
  import os
  import shlex
  import signal
  import subprocess
  import sys
  import termios
  import threading
  import time
  import psutil
  from .._ffi import register_func
  from .None import class_factory
  from .None import transport
  from .transport.file_descriptor import FdTransport
label_desc: Use image node_id 1 for calling the GdbDebugger obj's underlying member method code with example usage: obj._stop_all(cls) without return types