namespace Microsoft.ML.Transforms
{
    public sealed class StatefulCustomMappingEstimator<TSrc, TDst, TState> : TrivialEstimator<StatefulCustomMappingTransformer<TSrc, TDst, TState>>
        where TSrc, new(), class
        where TDst, new(), class
        where TState, new(), class
    {
        public override SchemaShape GetOutputSchema(SchemaShape inputSchema);
    }
}