import { InProgressSpan } from "./span";
type TraceContext = {
    traceId?: string;
    spanId?: string;
};
export declare function getTraceContextForPageLoad(): TraceContext | undefined;
export declare function addW3CTraceContextHttpHeaders(fn: (name: string, value: string) => void, ctx: unknown, span: InProgressSpan): void;
export declare function addXRayTraceContextHttpHeaders(fn: (name: string, value: string) => void, ctx: unknown, span: InProgressSpan): void;
export {};