How to pre-select rows based on the dataSet

[devGemScram]

I have a scenario where rows need to be selected on the initial load based on user data. I have been trying a lot but didn't find any solution. Given the following dataSet -

const mockData = [
{
firstName: "John",
lastName: "Dear",
checked: true
},
{
firstName: "Mick",
lastName: "Henley",
checked: true
},
{
firstName: "James",
lastName: "ken",
checked: false
}]

The rows for the first two data must be pre-selected when the page loads.