import type { Options, SamplingContext } from '@sentry/types';
/**
 * Makes a sampling decision for the given options.
 *
 * Called every time a root span is created. Only root spans which emerge with a `sampled` value of `true` will be
 * sent to Sentry.
 */
export declare function sampleSpan(options: Pick<Options, 'tracesSampleRate' | 'tracesSampler' | 'enableTracing'>, samplingContext: SamplingContext): [sampled: boolean, sampleRate?: number];
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