@nestjs/common/interfaces/hooks/on-destroy.interface.d.ts

/**
 * Interface defining method called just before Nest destroys the host module
 * (`app.close()` method has been evaluated).  Use to perform cleanup on
 * resources (e.g., Database connections).
 *
 * @see [Lifecycle Events](https://docs.nestjs.com/fundamentals/lifecycle-events)
 *
 * @publicApi
 */
export interface OnModuleDestroy {
    onModuleDestroy(): any;
}