import { Package } from "../Package.js";
import { InstructionSet } from "./InstructionSet.js";
/**
 * Represents a collection of instructions for updating a package.
 */
export declare class UpdateInstructionSet extends InstructionSet {
    /**
     * The version to update the package from.
     */
    private fromVersion;
    /**
     * Initializes a new instance of the {@link UpdateInstructionSet `UpdateInstructionSet`} class.
     *
     * @param extensionPackage
     * The package of the update-instruction.
     *
     * @param fromVersion
     * The minimum version of the update-instruction.
     */
    constructor(extensionPackage: Package, fromVersion: string);
    /**
     * Gets or sets the version to update the package from.
     */
    get FromVersion(): string;
    /**
     * @inheritdoc
     */
    set FromVersion(value: string);
    /**
     * @inheritdoc
     *
     * @returns
     * An element representing this instruction.
     */
    Serialize(): Element;
}