Codegen doesn't use "example" for response body

Not sure if this is by design or bug. I have example for every object under definitions section. When I use codegen to generate a nodejs server, I am hoping at least the response body for GET should use the example data, but it doesn't.

Example data shows up under "Response Class", but when I click "Try it out!", in stead of example data, I get generic json object generated by Codegen using the schema. Like {"userName": "aeiou"}

Do I miss anything? Thanks