protected BaseMigrate(List<long> availableMigrations, ITransformationProvider provider, ILogger logger, string schemainfoname)
{
_provider = provider;
_provider.SchemaInfoName(schemainfoname);
_availableMigrations = availableMigrations;
_original = new List<long> (_provider.AppliedMigrations.ToArray()); //clone
_logger = logger;
}