Subsonic migrations: add subsonic state columns supplementary

Question

Within a SubSonic migration this code:

    public override void Up()
    {
        TableSchema.Table test = CreateTableWithKey("test");
        AddSubSonicStateColumns(test);

        base.Up();
    }

generates the following ddl for MySQL:

CREATE TABLE `test` (
  `id` INTEGER NOT NULL AUTO_INCREMENT,
  `CreatedOn` datetime ,
  `ModifiedOn` datetime ,
  `CreatedBy` nvarchar(64) NULL,
  `ModifiedBy` nvarchar(64) NULL,
  PRIMARY KEY (`id`) 
);

But if I have an existing table and decide to add the Columns afterwards:

    public override void Up()
    {
        TableSchema.Table oldtable1 = GetTable("oldtable1");
        AddSubSonicStateColumns(oldtable1);

        TableSchema.Table oldtable2 = new TableSchema.Table("oldtable2");
        AddSubSonicStateColumns(oldtable2);

        base.Up();
    }

both ways don't seem to generate any sql. Well I know I can do:

        AddColumn("oldtable3", "CreatedOn", System.Data.DbType.DateTime, 0, true);
        AddColumn("oldtable3", "ModifiedOn", System.Data.DbType.DateTime, 0, true);
        AddColumn("oldTable3", "CreatedBy", System.Data.DbType.String, 64, true);
        AddColumn("oldTable3", "ModifiedBy", System.Data.DbType.String, 64, true);

but AddSubSonicStateColumns looks more elegant.