import { PartialJSONObject } from '@lumino/coreutils';
/**
 * Interfaces for `IExecuteReplyMsg.user_expressisons`
 */
export interface IBaseExpressionResult extends PartialJSONObject {
    status: string;
}
export interface IExpressionOutput extends IBaseExpressionResult {
    status: 'ok';
    data: PartialJSONObject;
    metadata: PartialJSONObject;
}
export interface IExpressionError extends IBaseExpressionResult {
    status: 'error';
    traceback: string[];
    ename: string;
    evalue: string;
}
export declare type IExpressionResult = IExpressionError | IExpressionOutput;
export declare function isOutput(output: IExpressionResult): output is IExpressionOutput;
export declare function isError(output: IExpressionResult): output is IExpressionError;