type StateChangeListener = (state: Record<string, any>) => void;
declare namespace SystemState {
    function getState(): Record<string, any>;
    function setState(newState: Record<string, any>): void;
    function reset(): void;
    function getAlertResponse(): number | undefined;
    function setAlertResponse(response: number | undefined): void;
    function getTextFieldValue(fieldId: string): string | undefined;
    function setTextFieldValue(fieldId: string, value: string): void;
    function addEventListener(event: 'stateChange', listener: StateChangeListener): void;
    function removeEventListener(event: 'stateChange', listener: StateChangeListener): void;
    function subscribe(handler: StateChangeListener): () => void;
}

export { SystemState };