anchor.diff:      {_, new_node3} = proplists:lookup(new_node_left_running_with_synced_old_chain, SavedCfg),
       {_, TopHeight} = proplists:lookup(db_backup_top_height, Cfg),
       {_, _TopHash} = proplists:lookup(db_backup_top_hash, Cfg),
  +    OldProtocolVersion = old_protocol_version(),
       HeightOfNewProtocol = ?HEIGHT_OF_NEW_PROTOCOL(TopHeight),
  -    #{version := ?V_0_11_0_PROTOCOL_VERSION, %% TODO Check mining capability with all protocols - not only the last one.
  +    #{version := OldProtocolVersion, %% TODO Check mining capability with all protocols - not only the last one.
         height := TopHeight} = aest_nodes:get_top(new_node3, Cfg),
       HeightToBeMinedWithOldProtocol = - 1 + HeightOfNewProtocol,
       {true, _} = {HeightToBeMinedWithOldProtocol > TopHeight,
  
positive.code:     ok = mock_pow_on_node(old_node1, Cfg), %% TODO Make configurable.
      run_erl_cmd_on_node(new_node3, "aec_conductor:start_mining().", "ok", Cfg), %% It would be better to: stop container, reinstantiate config template, start container.
      wait_for_height_syncing(HeightToBeMinedWithOldProtocol, [new_node3], {{10000, ms}, {1000, blocks}}, Cfg),
      #{version := ?V_0_11_0_PROTOCOL_VERSION, %% TODO Check mining capability with all protocols - not only the last one.
        hash := HashMined} = get_block_by_height(new_node3, HeightToBeMinedWithOldProtocol, Cfg),
      %% Ensure distinct non-mining new node can sync mined block(s).
      wait_for_height_syncing(HeightToBeMinedWithOldProtocol, [new_node4], {{45000, ms}, {200, blocks}}, Cfg),
  
negative.code:     {_, new_node3} = proplists:lookup(new_node_left_running_with_synced_old_chain, SavedCfg),
      {_, TopHeight} = proplists:lookup(db_backup_top_height, Cfg),
      {_, _TopHash} = proplists:lookup(db_backup_top_hash, Cfg),
      OldProtocolVersion = old_protocol_version(),
      NewProtocolVersion = new_protocol_version(),
      HeightOfNewProtocol = ?HEIGHT_OF_NEW_PROTOCOL(TopHeight),
      start_node(new_node4, Cfg),
      wait_for_height_syncing(TopHeight, [new_node4], {{45000, ms}, {200, blocks}}, Cfg),
  