samba - Mar 2025 - Practical Documentation / Starting Point for Samba libhimmelblau?

I would like to use the 'experimental' himmelblau authentication in the
latest Samba release, but documentation seems to be thin on the ground...

Are there any (practical) guides on how to set this up?  For example:

  *
Compile samba from source with the appropriate flags (I assume?)
  *
In samba config:
     *
Specify some himmelblau settings to connect to Microsoft Entra
     *
Including some credentials?
        *
Any Entra setup required for those credentials?
     *
Specify passdb backend? tdbsam?
     *
idmap settings?
     *
etc?

I'd love to be able to experiment with this, but am having a hard time
finding the 'starting point'.

Thanks!