Filling Tabulator cells through a callback function

[axel-adragna]

Is your feature request related to a problem? Please describe.
I'd like to fill the table through a callback function that asks for cells values.

Describe the solution you'd like
I've been considering the possibility of using Tabulator in a different way than the conventional one. Specifically, I would like the data to be populated not by providing the table with a predetermined set of data (either during initialization or through an AJAX call), but rather I would like the table to set up an "on-demand" mechanism to request data itself when it needs to be displayed, through a callback function called when the row is visible.
The only information Tabulator should know from the start is the number of rows to display (and of course, the definition of the columns).

Here's an example of what I mean:

// callback function
function getDataCallback(row, col, cell, ...anything) {
    return retrieveDataFromMySource(args);
}

//column definition
{title:"Name", field:"name", getOnDemandData:getDataCallback}

I know that the table is already very efficient in rendering data, so this additional feature could be interesting.

Describe alternatives you've considered
A workaround would be to fill the table with dummy data and then replace it as soon as the row becomes visible. But of course it's not a clean and straightforward solution.

I've been a long-time user of this library, thank you for all the work you put into it 😀