import { CoreOptions } from '../types-hoist/options';
import { SamplingContext } from '../types-hoist/samplingcontext';
/**
 * 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<CoreOptions, 'tracesSampleRate' | 'tracesSampler'>, samplingContext: SamplingContext, sampleRand: number): [
    /*sampled*/ boolean,
    /*sampleRate*/ number,
    /*localSampleRateWasApplied*/ boolean
];
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