<div style={{ marginBottom: 8 }}>
  <Button onClick={() => sessionStorage.removeItem('clipboardImportRows')}>
    Clear session storage
  </Button>
</div>
<div style={{ height: 400 }}>
  <DataGridPremium
    {...data}
    disableRowSelectionOnClick
    checkboxSelection
    cellSelection
    processRowUpdate={processRowUpdate}
    ignoreValueFormatterDuringExport
  />
</div>