How to build the UE4 runtime as a library(lib or dll),in order to embed it into our project。

in unreal engine 4.27 preview ,there is a new feature that we can build the UE4 runtime as a library and interact with it through a minimal,build-in API. This API starts UE4,optionally accepting a command-line and window handle and so on.Is anyone know how i can handle this process? Thanks very much.

This is the document Building Unreal Engine as a Library | Unreal Engine 4.27 Documentation