docs: def eth_getUncleCountByBlockHash(self, bhash):
          """https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_getunclecountbyblockhash
  
          :param bhash: Block hash
          :type bhash: str
  
          :return: count
          :rtype: int or None
          """
          response = yield from self.rpc_call('eth_getUncleCountByBlockHash',
                                              [bhash])
          if response:
              return hex_to_dec(response)
          return response