code: def compute_panel(cls, data, scales, params):
          
          msg = '{} needs to implement this method'
          raise NotImplementedError(msg.format(cls.__name__))
docs: Positions must override this function
  
          Notes
          -----
          Make necessary adjustments to the columns in the dataframe.
  
          Create the position transformation functions and
          use self.transform_position() do the rest.
  
          See Also
          --------
          position_jitter.compute_panel