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function getStatus(id, callback) {
	getStatusForThePastHour(id, function(err, status){
		if (err) {...}
		if (status.length > 0) {..}

		getLatestStatus(function(err, status) {
			if (err) {...}

			return callback(null, status);
		})
	});

	function getStatusForThePastHour(id, callback){..}
	function getLatestStatus(callback){..}
}