foreach ($allRoleIDs as $k => $v) {
$roleGroupTree = CRM_Core_BAO_CustomGroup::getTree('Participant', $this, $participantID, NULL, $v, $roleCustomDataTypeID);
foreach ($allRoleIDs as $k => $v) {
$roleGroupTree = CRM_Core_BAO_CustomGroup::getTree('Participant', $this, $participantID, NULL, $v, $roleCustomDataTypeID);