Passing Nested Header in RowDataGridProvider to setup datagrid header.

Hi All,

I need to populate the data from adp/sdp.

Here , how to pass Nested Header in RowDataGridProvider constructor to achieve Nested Header setup as shown below:

As share in below image, columns in each 3 sub headers are not same. Under Header1 , there are 4 col, Under header2 column is 7 and under header3 column is 6

Below is the code. Here I am passing column header but I am not able to figure out how to pass Nestedheader in object.

 function getRowGridDataProvider(sdp) {

    let EmployeeData = {

      id: Number,

      firstName: String,

      lastName: String,

      phoneNumber: String,

      email: String,

      salary: Number

    };


    return new RowDataGridProvider.RowDataGridProvider(sdp, {