[dev] examples for implementing setup_for_packing, prepare_rotamers_for_packing?

Hey,

Can anyone point me to good examples of implmentations for setup_for_packing and prepare_rotamers_for_packing (and I guess update_residue_for_packing while I'm at it)? I'm not entirely sure I understand what the arguments are for these methods and the use case for when I would want to implement these methods.

Thanks in advance!