import { type ExecutionContext } from "@nestjs/common";
export declare const baggageParamFactory: (key: string | undefined, _ctx: ExecutionContext) => string | import("@opentelemetry/api").Baggage | undefined;
/**
 * Decorator to retrieve OpenTelemetry Baggage from the active context.
 *
 * @param key (Optional) The specific baggage key to retrieve.
 *            If provided, returns the value (string) of that key.
 *            If not provided, returns the entire Baggage object.
 */
export declare const Baggage: (...dataOrPipes: (string | import("@nestjs/common").PipeTransform<any, any> | import("@nestjs/common").Type<import("@nestjs/common").PipeTransform<any, any>> | undefined)[]) => ParameterDecorator;