class Playbook::PbMultipleUsersStacked::MultipleUsersStacked

def bubble_classname(index)
  base_classname = "pb_multiple_users_stacked_item "
  case index
  when 0
    base_classname += "second_item"
    base_classname += " double_bubble" if double_bubble
    base_classname += " triple_bubble" if triple_bubble
    base_classname += " quadruple_bubble" if quadruple_bubble
  when 1
    base_classname += "third_item"
    base_classname += " quadruple_bubble" if quadruple_bubble
  else
    base_classname += "fourth_item"
  end
  base_classname
end