What command should I use in XRDP for "xfce+i3" session?

Help
1

Per this, I set my XFCE with I3. But I do not use a login-manager, instead, I use XRDP, which takes the command to start “desktop/window manager”.

I have no idea what is the starting command for “xfce+i3” session. I could not find the “.session” file for reference.

2

Found it. It is a *-xsession script in /nix/store.