SQLBuilder\Universal\Syntax\Column::notNull PHP Метод

    public function notNull()
    {
        $this->notNull = TRUE;
        return $this;
    }

 public function testAddColumnFirst()
 {
     $driver = new MySQLDriver();
     $args = new ArgumentArray();
     $column = new Column('last_name', 'varchar(30)');
     $column->default('');
     $column->notNull();
     $q = new AlterTableQuery('products');
     $q->addColumn($column)->first();
     $this->assertDriverQuery(new MySQLDriver(), $q);
     $this->assertSqlStrings($q, [[new MySQLDriver(), 'ALTER TABLE `products` ADD COLUMN `last_name` varchar(30) NOT NULL DEFAULT \'\' FIRST']]);
 }