statsv.js
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statsv.js
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	/**
	* @module instrumentation/statsv
	* @private
	*/

	/**
	* Gets whether Graphite logging (via [the statsv HTTP endpoint][0]) is enabled
	* for the duration of the user's session. The bucketing rate is controlled by
	* `wgPopupsStatsvSamplingRate`.
	*
	* [0]: https://wikitech.wikimedia.org/wiki/Graphite#statsv
	*
	* @param {mw.User} user The `mw.user` singleton instance
	* @param {mw.Map} config The `mw.config` singleton instance
	* @param {Experiments} experiments
	* @return {boolean}
	*/
	export function isEnabled( user, config, experiments ) {
	const bucketingRate = config.get( 'wgPopupsStatsvSamplingRate', 0 );
	if ( bucketingRate === 0 \|\| bucketingRate === 1 ) {
	// Avoid calling user.sessionId() if possible, since it sets a cookie
	return !!bucketingRate;
	}

	return experiments.weightedBoolean(
	'ext.Popups.statsv',
	bucketingRate,
	user.sessionId()
	);
	}