code: def baseOn(self, *args):
          
          if isinstance(args[0], dict):
              self.baseOn(*args[0].items())
          else:
              for (param, value) in args:
                  self.addGrid(param, [value])
  
          return self
docs: Sets the given parameters in this grid to fixed values.
          Accepts either a parameter dictionary or a list of (parameter, value) pairs.