import { SpanProcessor, Span } from "@opentelemetry/sdk-trace-base";
export declare class AttributeSpanProcessor implements SpanProcessor {
    private _attributes;
    constructor(attributes: {
        [key: string]: string;
    });
    onStart(span: Span): void;
    onEnd(): void;
    shutdown(): Promise<void>;
    forceFlush(): Promise<void>;
}