message: mission_item: fixup public comments
diff: @@ -203,11 +203,11 @@ public:
  */
  friend MissionImpl;
  - // Non-copyable
  /**
  * @brief Copy constructor (object is not copyable).
  */
  MissionItem(const MissionItem &) = delete;
  +
  /**
  * @brief Equality operator (object is not copyable).
  */
  @@ -218,8 +218,25 @@ private:
  std::unique_ptr<MissionItemImpl> _impl;
  };
  +/**
  + * @brief Equal operator to compare two `MissionItem` objects.
  + *
  + * @return `true` if items are equal.
  + */
  bool operator==(const MissionItem &lhs, const MissionItem &rhs);
  +
  +/**
  + * @brief Stream operator to print infos about a `MissionItem`.
  + *
  + * @return A reference to the stream.
  + */
  std::ostream &operator<<(std::ostream &str, MissionItem const &mission_item);
  +
  +/**
  + * @brief Stream operator to print infos about a `MissionItem::CameraAction`.
  + *
  + * @return A reference to the stream.
  + */
  std::ostream &operator<<(std::ostream &str, MissionItem::CameraAction const &camera_action);
  } // namespace dronecore
  