docs: def get_rosetta_sequence_to_atom_json_map(self):
          '''Returns the mapping from Rosetta residue IDs to PDB ATOM residue IDs in JSON format.'''
          import json
          if not self.rosetta_to_atom_sequence_maps and self.rosetta_sequences:
              raise Exception('The PDB to Rosetta mapping has not been determined. Please call construct_pdb_to_rosetta_residue_map first.')
  
          d = {}
          for c, sm in self.rosetta_to_atom_sequence_maps.iteritems():
              for k, v in sm.map.iteritems():
                  d[k] = v
              #d[c] = sm.map
          return json.dumps(d, indent = 4, sort_keys = True)