code: def match(self, name, chamber=None):
          
          try:
              return self._manual[chamber][name]
          except KeyError:
              pass
  
          if chamber == 'joint':
              chamber = None
  
          try:
              return self._codes[chamber][name]
          except KeyError:
              pass
  
          if chamber not in self._names:
              logger.warning("Chamber %s is invalid for a legislator." % (
                  chamber
              ))
              return None
  
          name = self._normalize(name)
          return self._names[chamber].get(name, None)
docs: If this matcher has uniquely seen a matching name, return its
          value. Otherwise, return None.
  
          If chamber is set then the search will be limited to legislators
          with matching chamber. If chamber is None then the search
          will be cross-chamber.