Error using getColumnCombo method

I’m trying to use the grid.getColumnCombo function but get a javascript error indicating the method is not supported. I also can not find a reference to this function in the codebase. Is the function not added to the latest grid library?

To use this method you should attach dhtmlxgrid_excell_combo.js file to your page.
If you are not using “combo” eXcell, you can get combo object with getCombo() or getCustomCombo() methods … n_from_xml