docs: def get_atom_sequence_to_rosetta_json_map(self):
          '''Returns the mapping from PDB ATOM residue IDs to Rosetta residue IDs in JSON format.'''
          import json
          d = {}
          atom_sequence_to_rosetta_mapping = self.get_atom_sequence_to_rosetta_map()
          for c, sm in atom_sequence_to_rosetta_mapping.iteritems():
              for k, v in sm.map.iteritems():
                  d[k] = v
          return json.dumps(d, indent = 4, sort_keys = True)