Triggered after a new or existing Option Matrix record has been updated from a CSV file.
Example
public function subscribeEvents()
{
Backend::$events->addEvent('shop:onAfterCsvOptionMatrixImport', $this, 'after_om_import');
}
public function after_om_import($result, $fields, $product_id, $record_options, $csv_row)
{
// Do something
}