`eth_getUncleCountByBlockHash`
        `eth_getUncleCountByBlockNumber`

def getUncleCount(self, block_identifier):
        """
        `eth_getUncleCountByBlockHash`
        `eth_getUncleCountByBlockNumber`
        """
        method = select_method_for_block_identifier(
            block_identifier,
            if_predefined='eth_getUncleCountByBlockNumber',
            if_hash='eth_getUncleCountByBlockHash',
            if_number='eth_getUncleCountByBlockNumber',
        )
        result = self.web3.manager.request_blocking(
            method,
            [block_identifier],
        )
        if result is None:
            raise BlockNotFound(f"Block with id: {block_identifier} not found.")
        return result