code: def raw(self, key, default=None):
          ''' Return the header value as is (may be bytes or unicode). '''
          return self.environ.get(self._ekey(key), defaultf raw(self, key, default=None):
          ''' Return the header value as is (may be bytes or unicode). '''
          return self.environ.get(self._ekey(key), default)
docs: Return the header value as is (may be bytes or unicode).