export type Disposer = () => void;
export declare class DisposerStack {
    #private;
    get disposed(): boolean;
    add(dispose: Disposer): Disposer;
    dispose(): void;
}
export declare class AsyncMountScope {
    #private;
    get disposed(): boolean;
    next(): number;
    active(generation: number): boolean;
    invalidate(): void;
    dispose(): void;
}
export declare class HostElementLease {
    #private;
    constructor(element: HTMLElement);
    attribute(name: string, value: string | null): void;
    className(name: string, enabled: boolean): void;
    style(name: string, value: string | null, priority?: string): void;
    dispose(): void;
}
export declare class HostElementBaseline {
    #private;
    constructor(root: HTMLElement);
    restore(): void;
}
export declare class OwnedNodes {
    #private;
    add<T extends Node>(node: T): T;
    dispose(): void;
}
export interface FilePickerOptions {
    readonly accept?: string;
    readonly multiple?: boolean;
    readonly signal?: AbortSignal;
    readonly onFiles: (files: readonly File[]) => void;
    readonly onCancel?: () => void;
    readonly onError?: (error: unknown) => void;
}
export declare function openFilePicker(owner: Document, options: FilePickerOptions): Disposer;
export declare function acquireGestureRoot(root: HTMLElement, lands?: readonly HTMLElement[]): Disposer;
export declare function ownsGestureRoot(root: HTMLElement, target: EventTarget | null, identity?: HTMLElement): boolean;
export declare function activateGestureRoot(root: HTMLElement, identity?: HTMLElement, deactivate?: () => void): Disposer;
export declare function ownsActiveGestureRoot(root: HTMLElement, identity?: HTMLElement): boolean;
export declare function claimMountRoot(root: HTMLElement): Disposer;
export interface StyleMarker {
    readonly name: string;
    readonly value?: string;
}
export declare function acquireStyleSheet(owner: Document, text: string, marker?: StyleMarker): Disposer;
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