This pipeline is used to specify the SQL tables not to be emptied just before a restore.
It is called by the lister_tables_noerase
function in the ecrire/base/dump.php file. It accepts as parameter and returns as output an array containing the list of database tables not to be purged:
$IMPORT_tables_noerase = pipeline('lister_tables_noerase', $IMPORT_tables_noerase);