declare class PortfolioItem {
    private readonly _asset;
    private readonly _isPortfolioItem;
    private _value;
    constructor(value?: number, asset?: string);
    get asset(): string;
    set value(v: number);
    get value(): number;
    get isPortfolioItem(): boolean;
    /**
     * Swaps portfolio item for another.
     * @param value
     * @param newName
     * @param price
     * @returns
     */
    swap(value: number, asset: string, price: number): PortfolioItem;
}
export { PortfolioItem };