docs: def convert_from_rosetta(self, residue_id, to_scheme):
          '''A simpler conversion function to convert from Rosetta numbering without requiring the chain identifier.'''
  
          assert(type(residue_id) == types.IntType)
  
          # Find the chain_id associated with the residue_id
          # Scan *all* sequences without breaking out to make sure that we do not have any duplicate maps
          chain_id = None
          for c, sequence in self.rosetta_sequences.iteritems():
              for id, r in sequence:
                  if r.ResidueID == residue_id:
                      assert(chain_id == None)
                      chain_id = c
  
          if chain_id:
              return self.convert(chain_id, residue_id, 'rosetta', to_scheme)
          else:
              return None