Rounding with ThetaSketches

I have a quick question about rounding. I use the ThetaSketches extension to count unique users like so:

  query = {
    dataSource: 'telemetry-signals',
    granularity: 'all',
    aggregations: [
        type: 'thetaSketch',
        name: 'Total users',
        fieldName: 'clientUser',
    queryType: 'timeseries',

However, for large numbers, this returns a float value (which is to be expected, given the nature of the algorithms). Is there a post aggregator or something I can use to round that value before displaying it to my users?