code: def case(self, size, kw, *parameters):
          
          # TODO: check we are inside a bag!
          self._start_bag_case(size)
          BuiltIn().run_keyword(kw, *parameters)
          self._end_bag_case()
docs: An element inside a bag started with `Start Bag`.
  
          The first argument is size which can be absolute value like `1`, a range
          like `0-3`, or just `*` to accept any number of elements.
  
          Examples:
          | Start bag | intBag |
          | case | 0-1 | u8 | foo | 42 |
          | case | 0-2 | u8 | bar | 1 |
          | End bag |