Logic issue with ConfigSplitImportForm::updateStatusOverride() -- Argument #2 ($status) must be of type string, null given

Problem/Motivation

updateStatusOverride function, located in config_split/src/Form/ConfigImportFormTrait.php has some logic issue.

It is being called only once from the launchImport function

Below are the code:

        if (!$override !== NULL) {
          $batch_builder->addOperation([$this, 'updateStatusOverride'], [$this->getSplit()->getName(), $override]);
        }

This code will go the updateStatusOverride callback only in case of $override === NULL.

But the callback itself expects a string. Having NULL as a parameter leads to an error.

So basically, I think this is just a small mistyping issue, and instead of
if (!$override !== NULL) {

should be

if ($override !== NULL) {