import { ErrorBase } from './ErrorBase';
/**
 * Custom implementation of Error for reporting a message and the causing Error.
 */
export declare class NestedError extends ErrorBase {
    /**
     * Gets the error that caused this error (or null if no inner error was specified).
     */
    readonly innerError: Error | null;
    /**
     * Initializes a new instance of the [[NestedError]] class.
     * @param message A description of the error.
     * @param innerError The error that caused the [[NestedError]].
     */
    constructor(message: string, innerError?: Error | null);
    /**
     * Creates a string representation of this error.
     * @returns A string representation of this error.
     */
    toString(): string;
}