Craft\m160122_000000_seomatic_addTypeFields::safeUp PHP Method

    public function safeUp()
    {
        // specify columns and AttributeType
        $newColumns = array('siteOwnerSubType' => ColumnType::Varchar, 'siteOwnerSpecificType' => ColumnType::Varchar);
        $this->_addColumnsAfter("seomatic_settings", $newColumns, "siteOwnerType");
        // specify columns and AttributeType
        $newColumns = array('siteCreatorSubType' => ColumnType::Varchar, 'siteCreatorSpecificType' => ColumnType::Varchar);
        $this->_addColumnsAfter("seomatic_settings", $newColumns, "siteCreatorType");
        // return true and let craft know its done
        return true;
    }