code: def param_get(param):
          
          instance = param.effect.instance
  
          return 'param_get {} {}'.format(instance, param.symbol)
docs: ``param_get <instance_number> <param_symbol>``
  
          get the value of the request control
  
          e.g.::
  
              param_get 0 gain
  
          :param Lv2Param param: Parameter that will be get your current value