docs: def prefix_keys(self, prefix, strip_prefix=False):
          """Get all keys that begin with ``prefix``.
  
          :param prefix: Lexical prefix for keys to search.
          :type prefix: bytes
  
          :param strip_prefix: True to strip the prefix from yielded items.
          :type strip_prefix: bool
  
          :yields: All keys in the store that begin with ``prefix``.
  
          """
          keys = self.keys(key_from=prefix)
  
          start = 0
          if strip_prefix:
              start = len(prefix)
  
          for key in keys:
              if not key.startswith(prefix):
                  break
              yield key[start:]