javascript - How to use Kotlin anonymous classes as arguments for native JavaScript Functions?

Question

I am setting up the interop layer for this ThreeJS class and the constructor of the class takes in a object which is used to set the properties.

//PointCloudMaterial.js    
THREE.PointCloudMaterial = function ( parameters ) {
    THREE.Material.call( this );
    this.color = new THREE.Color( 0xffffff );
    this.map = null;
    this.size = 1;
    this.sizeAttenuation = true;
    this.vertexColors = THREE.NoColors;
    this.fog = true;
    this.setValues( parameters );
};

Below is what I would like to be able to do in Kotlin, is it possible to use anomalous objects in should a fashion? I was originally thinking of creating an object equivalent to the possible perimeters to pass in, problem with that is it would override the current values which is not something I want.

//Interop Layer
native("THREE.PointCloudMaterial")
public class PointCloudMaterial(parameters: object) { } //This doesn't compile "Type Expected"

//Example usage
var sizeObject = object {
     var size: Double = size
}
PointCloudMaterial(sizeObject);