import type { DiffFormatter } from './DiffFormatter';
/**
 * A no-op [`DiffFormatter`](https://serenity-js.org/api/core/interface/DiffFormatter/) that produces output identical to input.
 *
 * @group Errors
 */
export declare class NoOpDiffFormatter implements DiffFormatter {
    expected(line: string): string;
    received(line: string): string;
    unchanged(line: string): string;
}
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