private string GetInstalledVersion(string schema)
 {
     return(_repository.GetInstalledVersion(schema));
     // return _db.GetValue<string>("select " + _db.EscapeIdentifier("Version") + " from " + _db.EscapeIdentifier(TableName) + " where {0}=@0 order by {1} desc".ToFormat(_db.EscapeIdentifier("SchemaName"),_db.EscapeIdentifier("Id")), schema);
 }