Reload CellTable data

I 'd like to add a button to reload the CellTable when it's pushed,
but I can only find:
- cellTable.redraw(); // Doesn't reload the data from the backend
- simplePager.firstPage(); // I don't want it to change the page

Is there an easy way to do something like cellTable.reload() or
cellTable.refresh() ?

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With kind regards,
Geoffrey De Smet

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