/**
 * Error thrown by the AuthSureFlowClient.
 */
export declare class AuthSureFlowClientError extends Error {
    readonly cause?: unknown;
    readonly name = "AuthSureFlowClientError";
    constructor(message: string, cause?: unknown);
}
/**
 * Returns true if the error is an AuthSureFlowClientError.
 *
 * @param e the error to check
 */
export declare function isAuthSureFlowClientError(e?: unknown): e is AuthSureFlowClientError;
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