code: def show_error(cls, error=True):
          
          if error:
              cls.input_el.style.border = "2px solid red"
              cls.conspect_el.style.border = "2px solid red"
              cls.subconspect_el.style.border = "2px solid red"
          else:
              cls.input_el.style.border = "0"
              cls.conspect_el.style.border = "0"
              cls.subconspect_el.style.border = "0"
docs: Show `error` around the conspect elements. If the `error` is ``False``,
          hide it.