export declare class PortfolioError extends Error {
    readonly name: string;
    readonly isPortfolioError = true;
    readonly source: PortfolioErrorSource;
    readonly sourceDetails?: string;
    readonly cause?: Error;
    constructor(message: string, source: PortfolioErrorSource, sourceDetails?: string, cause?: Error);
    toString(): string;
}
export type PortfolioErrorSource = 'adapter' | 'manager' | 'sdk';