How do I activate “The new folding that shows parameter names for method values” in IntelliJ 14?

Hi,

How do I activate the new function that shows parameter names for method values in IntelliJ 14?

https://confluence.jetbrains.com/display/IDEADEV/IDEA+14+EAP

I saw this function (and liked it!) in one of the EAPs, but it seems to have disappeared from my IDE in the official release of IntelliJ 14.

Thanks

/Markus