def METHOD_NAME(self):
    # Start with a 200 block chain
    assert_equal(self.nodes[0].getblockcount(), 200)
    # Mine four blocks. After this, nodes[0] blocks
    # 101, 102, and 103 are spend-able.
    new_blocks = self.nodes[1].generate(4)
    self.sync_all()
    node0_address = self.nodes[0].getnewaddress()
    node1_address = self.nodes[1].getnewaddress()
    # Three scenarios for re-orging coinbase spends in the memory pool:
    # 1. Direct coinbase spend  :  spend_101
    # 2. Indirect (coinbase spend in chain, child in mempool) : spend_102 and spend_102_1
    # 3. Indirect (coinbase and child both in chain) : spend_103 and spend_103_1
    # Use invalidatblock to make all of the above coinbase spends invalid (immature coinbase),
    # and make sure the mempool code behaves correctly.
    b = [ self.nodes[0].getblockhash(n) for n in range(101, 105) ]
    coinbase_txids = [ self.nodes[0].getblock(h)['tx'][0] for h in b ]
    spend_101_raw = create_raw_transaction(self.nodes[0], coinbase_txids[1], node1_address, amount=49.99)
    spend_102_raw = create_raw_transaction(self.nodes[0], coinbase_txids[2], node0_address, amount=49.99)
    spend_103_raw = create_raw_transaction(self.nodes[0], coinbase_txids[3], node0_address, amount=49.99)
    # Create a transaction which is time-locked to two blocks in the future
    timelock_tx = self.nodes[0].createrawtransaction([{"txid": coinbase_txids[0], "vout": 0}], {node0_address: 49.99})
    # Set the time lock
    timelock_tx = timelock_tx.replace("ffffffff", "11111191", 1)
    timelock_tx = timelock_tx[:-8] + hex(self.nodes[0].getblockcount() + 2)[2:] + "000000"
    timelock_tx = self.nodes[0].signrawtransaction(timelock_tx)["hex"]
    # This will raise an exception because the timelock transaction is too immature to spend
    assert_raises_rpc_error(-26, "non-final", self.nodes[0].sendrawtransaction, timelock_tx)
    # Broadcast and mine spend_102 and 103:
    spend_102_id = self.nodes[0].sendrawtransaction(spend_102_raw)
    spend_103_id = self.nodes[0].sendrawtransaction(spend_103_raw)
    self.nodes[0].generate(1)
    # Time-locked transaction is still too immature to spend
    assert_raises_rpc_error(-26, 'non-final', self.nodes[0].sendrawtransaction, timelock_tx)
    # Create 102_1 and 103_1:
    spend_102_1_raw = create_raw_transaction(self.nodes[0], spend_102_id, node1_address, amount=49.98)
    spend_103_1_raw = create_raw_transaction(self.nodes[0], spend_103_id, node1_address, amount=49.98)
    # Broadcast and mine 103_1:
    spend_103_1_id = self.nodes[0].sendrawtransaction(spend_103_1_raw)
    last_block = self.nodes[0].generate(1)
    # Time-locked transaction can now be spent
    timelock_tx_id = self.nodes[0].sendrawtransaction(timelock_tx)
    # ... now put spend_101 and spend_102_1 in memory pools:
    spend_101_id = self.nodes[0].sendrawtransaction(spend_101_raw)
    spend_102_1_id = self.nodes[0].sendrawtransaction(spend_102_1_raw)
    self.sync_all()
    assert_equal(set(self.nodes[0].getrawmempool()), {spend_101_id, spend_102_1_id, timelock_tx_id})
    for node in self.nodes:
        node.invalidateblock(last_block[0])
    # Time-locked transaction is now too immature and has been removed from the mempool
    # spend_103_1 has been re-orged out of the chain and is back in the mempool
    assert_equal(set(self.nodes[0].getrawmempool()), {spend_101_id, spend_102_1_id, spend_103_1_id})
    # Use invalidateblock to re-org back and make all those coinbase spends
    # immature/invalid:
    for node in self.nodes:
        node.invalidateblock(new_blocks[0])
    self.sync_all()
    # mempool should be empty.
    assert_equal(set(self.nodes[0].getrawmempool()), set())