import type { Backend } from 'dnd-core';
export type Transition = {
    event: string;
    check: (e: Event) => boolean;
};
export type BackendEntry = {
    id: string;
    instance: Backend;
    preview: boolean;
    transition?: Transition;
    skipDispatchOnTransition: boolean;
};
export interface MultiBackendSwitcher extends Backend {
    backendsList(): BackendEntry[];
    previewsList(): PreviewList;
    previewEnabled(): boolean;
}
export interface PreviewListener {
    backendChanged(backend: MultiBackendSwitcher): void;
}
export interface PreviewList {
    register(listener: PreviewListener): void;
    unregister(listener: PreviewListener): void;
    backendChanged(backend: MultiBackendSwitcher): void;
}