import { type Context } from '@opentelemetry/api';
import type { ReadableSpan, Span, SpanProcessor } from '@opentelemetry/sdk-trace-web';
import { type UserActionStartMessage } from '@grafana/faro-web-sdk';
export declare class FaroUserActionSpanProcessor implements SpanProcessor {
    private processor;
    message: UserActionStartMessage | undefined;
    constructor(processor: SpanProcessor);
    forceFlush(): Promise<void>;
    onStart(span: Span, parentContext: Context): void;
    onEnd(span: ReadableSpan): void;
    shutdown(): Promise<void>;
}