my_child_containers = my_children.map(&:container_uuid).compact.uniq
grandchildren = {}
my_child_containers.each { |c| grandchildren[c] = []} if my_child_containers.any?
my_child_containers = my_children.map(&:container_uuid).compact.uniq
grandchildren = {}
my_child_containers.each { |c| grandchildren[c] = []} if my_child_containers.any?