JavaScript functions for Geopoint or Geoshape

[WPG03WPG03]

I would like to write JavaScript functions that can be directly used in the calculation column of geopoint and geoshape, as follows:

/*
 * JavaScript functions for Survey123
 */

function getGeoPoint() {

    // Add your code here

    return "1.0000 2.00000";
}

function getGeoShape() {

    // Add your code here

    return "0.0000 0.00000;0.1000 0.00000;0.1000 0.10000; 0.0000 0.10000";
}

However, the above JavaScript functions do not work and return the following error:

It seems that the expected output is not some space-separated values of latitude and longitude.  What are the correct output from a JavaScript functions that can be directly used by geopoint and geoshape?  I can't find such documentations. 

[WPG03WPG03]

bump

[WPG03WPG03]

@JamesTedrick  Grateful if you can shed some lights on this problem.  Thanks.

[WPG03WPG03]

As a workaround, modify the calculation column using the following syntax:

string(pulldata("@javascript", ...))+" "
string(pulldata("@json", ...))+" "