src/vs/platform/terminal/node/ptyHostService.ts/PtyHostService/_handleHeartbeatSecondTimeout
class PtyHostService:	private _handleHeartbeatSecondTimeout() {
		this._logService.error(`No ptyHost heartbeat after ${(HeartbeatConstants.BeatInterval * HeartbeatConstants.FirstWaitMultiplier + HeartbeatConstants.BeatInterval * HeartbeatConstants.FirstWaitMultiplier) / 1000} seconds`);
		this._heartbeatSecondTimeout = undefined;
		if (this._isResponsive) {
			/* __GDPR__
				"ptyHost/responsive" : {}
			*/
			this._telemetryService.publicLog('ptyHost/unresponsive');
			this._isResponsive = false;
		}
		this._onPtyHostUnresponsive.fire();
	}