import { ToolActionDescription } from "./ToolActionDescription";
import { Type } from "./type";
/**
 * @hidden
 */
export declare class ToolActionSubPanelDescription extends ToolActionDescription {
    static $t: Type;
    protected get_type(): string;
    constructor();
    private dw;
    get itemSpacing(): number;
    set itemSpacing(a: number);
}