Reactivity of properties of modals

[Kilovatiy]

I'm trying to create a modal window with reactive components, but I failed.
so, i create modalsService wrapper as so:
import { create as createModal } from 'vue-modal-dialogs';
export const modalsService = {
createModal,
toast: createModal(Toast, 'options', 'longRunningJob'),
};

then in my main component i have something like this to show modal:
modalsService.toast({message:'some text'}, this.isProcessing)

so, in modal(toast) i have this property passed, but it is not reactive.
Is there any way to detect if property that i passed have changed?