Found in Version 3.0.0-rc2 <img width="943" alt="screen shot 2017-06-03 at 9 27 21 am" src="https://cloud.githubusercontent.com/assets/405/26755311/9e88ca16-483f-11e7-8a70-d3981cbbeda7.png"> I guess this was intended to be `Map[string, Any|{expression}]`. But would `Map[string,{expression}]` suffice?