public bool IsVisible {get; set;}

{
  // Note: call within QueuedTask.Run()
  {
    if (voxelLayer.Visualization != VoxelVisualization.Surface)
      voxelLayer.SetVisualization(VoxelVisualization.Surface);
    voxelLayer.SetLockedSectionContainerExpanded(true);
    voxelLayer.SetLockedSectionContainerVisibility(true);

    var locked_sections = voxelLayer.GetLockedSections().Where(ls => !ls.IsVisible);

    //Make them visible
    foreach (var locked_section in locked_sections)
    {
      locked_section.IsVisible = true;
      //apply change
      voxelLayer.UpdateSection(locked_section);
    }
  }
}