import { Package } from "../Package";
import { InstructionSet } from "./InstructionSet";
/**
 * 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 `UpdateInstructionSet` class.
     */
    constructor($package: Package, fromVersion: string);
    /**
     * Gets or sets the version to update the package from.
     */
    FromVersion: string;
    /**
     * @inheritdoc
     */
    Serialize(): Element;
}