message: Start switching to bitset.
diff: namespace voxblox {
  +namespace Update {
  +/// State of which derived things still need to be updated.
  +enum State { kMap, kMesh, kEsdf, kCount };
  +}
  +
  /** An n x n x n container holding VoxelType. It is aware of its 3D position and
  * contains functions for accessing voxels by position and index */
  template <typename VoxelType>
  @@ -203,7 +208,7 @@ class Block {
  FloatingPoint block_size_inv_;
  /// Is set to true when data is updated.
  - std::atomic<bool> updated_;
  + std::bitset<Update::kCount> updated_;
  };
  } // namespace voxblox
  