TreeGrid Suite 6.x Number Formating?

How do I set the number format in the tree grid, I am using suite 6.x.

I have tried

treegrid.setNumberFormat(“0,000.00”, 2, “.”, “,”);

but I get this error.
Uncaught TypeError: treegrid.setNumberFormat is not a function in the console.

You may try to format your values using the cell templates: