message: [db_sql_plugin] add functions are private
diff: @@ -25,11 +25,12 @@ public:
  void consume(const std::vector<chain::block_state_ptr>& blocks) override;
  void wipe();
  +
  +private:
  void add(chain::block_state_ptr block);
  void add(chain::transaction_metadata_ptr transaction);
  void add(chain::action action);
  -private:
  mutable std::mutex m_mux;
  std::shared_ptr<soci::session> m_session;
  std::unique_ptr<accounts_table> m_accounts_table;
  