import { CallHandler } from '@nestjs/common/interfaces/features/nest-interceptor.interface';
import { ExecutionContext } from '@nestjs/common';
import { Observable } from 'rxjs';
import { ApmService } from './apm.service';
import { ApmInterceptorConstructor, UserContextKeys } from '../interface';
export declare class ApmHttpUserContextInterceptor extends ApmInterceptorConstructor {
    protected readonly apmService: ApmService;
    protected readonly mapFunction?: ((request: any) => UserContextKeys) | undefined;
    constructor(apmService: ApmService, mapFunction?: ((request: any) => UserContextKeys) | undefined);
    intercept(context: ExecutionContext, next: CallHandler<any>): Observable<any>;
}