def logout_all(self,
	               command='exit',
	               note=None,
	               echo=None,
	               timeout=shutit_global.shutit_global_object.default_timeout,
	               nonewline=False,
	               loglevel=logging.DEBUG):
		"""Logs the user out of all pexpect sessions within this ShutIt object.

			@param command:         Command to run to log out (default=exit)
			@param note:            See send()
		"""
		shutit_global.shutit_global_object.yield_to_draw()
		for key in self.shutit_pexpect_sessions:
			shutit_pexpect_session = self.shutit_pexpect_sessions[key]
			shutit_pexpect_session.logout_all(ShutItSendSpec(shutit_pexpect_session,
		                                                     send=command,
		                                                     note=note,
		                                                     timeout=timeout,
		                                                     nonewline=nonewline,
		                                                     loglevel=loglevel,
		                                                     echo=echo))
		return True
Logs the user out of all pexpect sessions within this ShutIt object.

			@param command:         Command to run to log out (default=exit)
			@param note:            See send()