Where:
- imol_map is an integer number
- imol is an integer number
- chain_id is a string
- resno is an integer number
- ins_code is a string
- direction_atoms_list is a SCM
- moving_atoms_list is a SCM
for the given residue, spin the atoms in moving_atom_list around the bond defined by direction_atoms_list looking for the best fit to density of imol_map map of the first atom in moving_atom_list. Works (only) with atoms in altconf ""