def copy
      checklist_copy = self.class.create(name: self.name, board_id: self.board_id, card_id: self.card_id)
      copy_items_to(checklist_copy)
      return checklist_copy
    end
def copy
      checklist_copy = self.class.create(name: self.name, board_id: self.board_id, card_id: self.card_id)
      copy_items_to(checklist_copy)
      return checklist_copy
    end
Copy a checklist (i.e., same attributes, items, etc.)