Function overloading issue

[o3o]

I have:

interface IChannel {
   ubyte[] send(const(ubyte[]) msg);
   string send(string msg);
}
class Channel: IChannel {
   ubyte[] send(const(ubyte[]) msg) {
      return [0];
   }
   string send(string msg) {
      return "foo";
   }
}
class Client {
   private IChannel chan;
   this(IChannel chan) {
      assert(chan !is null);
      this.chan = chan;
   }
   void use() {
      const(ubyte[]) buf = [0, 1, 2];
      chan.send(buf);
   }
}
unittest {
   auto chan = mock!IChannel;
   const(ubyte[]) buf = [0, 1, 2];
   chan.expect!"send"(buf);

   auto c = new Client(chan);
   c.use();
   chan.verify();
}

$ dub test 
./../../.dub/packages/unit-threaded-0.7.13/unit-threaded/source/unit_threaded/mock.d(158,5): Error: class unit_threaded.mock.Mock!(IChannel).Mock.MockAbstract interface function 'string send(string msg)' is not implemented

If I change

string send(string msg) {

to

string sendMsg(string msg) {

it works.

Thank you

[o3o]

Thank you very much!