import type { Span } from 'effect/Tracer';
export declare class PrettyError {
    readonly message: unknown;
    readonly stack: string | undefined;
    readonly span: Span | undefined;
    readonly isPlainString: boolean;
    readonly errorType?: unknown | undefined;
    constructor(message: unknown, stack: string | undefined, span: Span | undefined, isPlainString: boolean, errorType?: unknown | undefined);
}