How to stub out a generic method definition in an interface using Microsoft Fakes in c#

I have a unit test which stubs out the following interface using Microsoft Fakes:

public interface ITable
    {
        Task<TableResult> Retrieve(string tableReference, string partitionKey, string rowKey);
    }

The stub looks like this:

ITable table = new MessagesAPI.Azure.Fakes.StubITable()
            {
                RetrieveStringStringString = delegate
                  {
                      TableResult tableResult = new TableResult();
                      return Task.FromResult(tableResult);
                  }
            };

This works fine. However I'd like to change the interface to be more generic like so:

public interface ITable
    {
        Task<TableResult> Retrieve<T>(string tableReference, string partitionKey, string rowKey) where T : ITableEntity;
    }

Question is how would I stub this new version of the interface out? I'm having trouble getting the syntax right.

Any ideas?