$this can not be used in static methods
My IDE tells me that "$this can not be used in static methods". This is for in
public static function getIncompleteImportTables() in
CRM/Contact/Import/ImportJob.php. I don't know the best way to fix it, but here's a helpful link https://stackoverflow.com/questions/2286696/using-this-inside-a-static-function-fails.