import type { IOutput } from './output';
/**
 * Output used by an ExternalCommand, exists in the main UI not webworker.
 * This effectively wraps a real IOutput in the webworker ShellImpl IContext.
 */
export interface IExternalOutput extends IOutput {
}
export declare class ExternalOutput implements IExternalOutput {
    readonly callback: (text: string) => void;
    constructor(callback: (text: string) => void, isTerminal: boolean);
    flush(): void;
    isTerminal(): boolean;
    supportsAnsiEscapes(): boolean;
    write(text: string): void;
    private _isTerminal;
}