Rounding feature for SUM additive measure

[hamsof]

In cube.js there is not a feature when you want to apply rounding after the additive measured value.

 some_measure_1: {
      sql: `
        ${CUBE}.col1 - ${CUBE}.col2
      `,
      type: `sum`,
}

we have to introduce another measure for its rounded value

 some_measure_2: {
      sql: `
       ROUND(${CUBE.some_measure_1}, 2)
      `,
      type: `number`,
}

There should be some in additive measure object that should should accept rounding integer if required.
like

 some_measure_1: {
      sql: `
        ${CUBE}.col1 - ${CUBE}.col2
      `,
      type: `sum`,
     round: 2
}