When we have one cmd for two ContentTypes, how would we pass it to AddCommand:

```C#
        public void SetupCommands()
        {
            _mcs.AddCommand(new ChainCompileCommand(ContentTypeManager.GetContentType("LESS"), CommandId.ChainCompile).Command);
            _mcs.AddCommand(new ChainCompileCommand(ContentTypeManager.GetContentType("SASS"), CommandId.ChainCompile).Command);
        }
```

It was giving me error; something along the lines of "command id already added".