import { Middleware } from '../middleware';
import { Context } from '../context';
import { TraceIdResolver } from './trace-protocol';
export declare class TraceMiddleware implements Middleware {
    protected readonly traceIdResolver: TraceIdResolver;
    protected readonly traceField: string;
    handle(ctx: Context, next: () => Promise<void>): Promise<void>;
    readonly priority = 2200;
}
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