String filter Plugin for $row

Would be nice to have a way to filter import rows based on a string in a field. I'm doing this for one of my projects already. Would this be useful to the community?

/**
* Filters rows based on a string. If the string is not present, returns FALSE and
* skips the row
*
* @MigrateProcessPlugin(
* id = "string_filter",
*
*)
*/
class StringFilter extends ProcessPluginBase {
/**
* {@inheritdoc}
*/

public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
$string = isset($this->configuration['string']) ? $this->configuration['string'] : '';
if (!empty($value)) {
if(strpos($value, $string) !== FALSE) {
return $value;
}
else {
throw new MigrateSkipRowException();
}
}
}
}