How to use the @jscad/core/io/prepareOutput.prepareOutput function in @jscad/core

currentObjectsToBlob: function () {
    var startpoint = this.selectStartPoint
    var endpoint = this.selectEndPoint
    if (startpoint > endpoint) { startpoint = this.selectEndPoint; endpoint = this.selectStartPoint }

    const format = this.selectedFormat()

    // if output format is jscad or js , use that, otherwise use currentObjects
    const objects = (format === 'jscad' || format === 'js') ? this.script : this.currentObjects.slice(startpoint, endpoint + 1)

    return convertToBlob(prepareOutput(objects, {format}))
  },

.then(function (objects) {
      // Buffer.from(outputData.data),{encoding: outputData.mimeType},
      return convertToBlob(prepareOutput(objects, {format: outputFormat}))
    })