code: def create_galena_box
        # the box container type
        self.container_type = Galena.administrative_objects.box_type
        # the required box site
        self.site = Galena.administrative_objects.tissue_bank
        # A freezer with a slot for the box.
        frz = Galena.administrative_objects.freezer_type.find_available(site, :create)
        # Add the box to the first open slot in the first unfilled rack in the freezer.
        frz << self
        logger.debug { "Placed the tissue box #{self} in freezer #{frz}." }
        logger.debug { "Creating the tissue box #{self}..." }
        create
      end
docs: Creates a new box of type {Galena::Seed#box_type} in a freezer of type
   {Galena::Seed#freezer_type}.
  
   @return [StorageContainer] the new box