custom full disk encryption with ZFS

[Patryk Hanckowiak]

Hello.
The installer seems to allow for an encrypted setup using the whole disk 
... Or can you just use the installer to install FreeBSD on selected 
partitions of the disk with the ZFS encrypted setup? Is there a resource 
that shows how to create a custom full disk encryption with ZFS, 
something similar to LVM on LUKS in Linux?

Regards,
Patryk Hanckowiak