import { Component } from "../../core/Component";
import type { Obstruction } from "../entities/widgets/sprites/units/Obstruction";
export declare class UpgradeComponent extends Component<[
    obstruction: typeof Obstruction
]> {
    readonly obstruction: typeof Obstruction;
    initialize(obstruction: typeof Obstruction): void;
    toJSON(): {
        type: string;
        obstruction: string;
    };
}