// ####################### STEP: CUSTOM USER FIELDS #####################
public function stepUserFields(StepState $state)
{
$choiceLookUps = [];
$profileFields = $this->sourceDb->fetchAllKeyed($this->prepareImportSql($this->prefix, "
SELECT pf.*,
phr1.text AS title,
phr2.text AS description
FROM profilefield AS pf
INNER JOIN phrase AS phr1
ON (phr1.varname = CONCAT('field', pf.profilefieldid, '_title'))
INNER JOIN phrase AS phr2
ON (phr2.varname = CONCAT('field', pf.profilefieldid, '_desc'))
WHERE pf.profilefieldid > 3
"), 'profilefieldid');
....
}