import type { UiSchemaAttributeRegistry } from "../attribute-registry.js";
import type { UiSchemaObject } from "../types.js";
import { UiCustomAttributeCollection } from "./custom-attributes.js";
import type { UiSchemaFactory } from "./factory.js";
import { LabeledLayout, UnlabeledLayout } from "./simple-layout.js";
import type { UiElementVisitor } from "./visitor.js";
export declare class VerticalLayout extends UnlabeledLayout {
    readonly elementKind: "VerticalLayout";
    constructor(registry?: UiSchemaAttributeRegistry, customAttributes?: UiCustomAttributeCollection);
    static fromJSON(json: UiSchemaObject, factory: UiSchemaFactory): VerticalLayout;
    accept<T>(visitor: UiElementVisitor<T>): T;
    deepClone(): VerticalLayout;
    protected writeElementDefinition(json: UiSchemaObject): void;
}
export declare class HorizontalLayout extends UnlabeledLayout {
    readonly elementKind: "HorizontalLayout";
    constructor(registry?: UiSchemaAttributeRegistry, customAttributes?: UiCustomAttributeCollection);
    static fromJSON(json: UiSchemaObject, factory: UiSchemaFactory): HorizontalLayout;
    accept<T>(visitor: UiElementVisitor<T>): T;
    deepClone(): HorizontalLayout;
    protected writeElementDefinition(json: UiSchemaObject): void;
}
export declare class Group extends LabeledLayout {
    readonly elementKind: "Group";
    constructor(label?: string, registry?: UiSchemaAttributeRegistry, customAttributes?: UiCustomAttributeCollection);
    static fromJSON(json: UiSchemaObject, factory: UiSchemaFactory): Group;
    accept<T>(visitor: UiElementVisitor<T>): T;
    deepClone(): Group;
    protected writeElementDefinition(json: UiSchemaObject): void;
}
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