code: def _is_valid_by_code(self, val):
      return val in self.valid_values_by_code
  
file_path: mindsdb/mindsdb/integrations/handlers/oilpriceapi_handler/oilpriceapi.py
imports: import requests
label_desc: Use image node_id 4 for calling the OilPriceAPIClient obj's underlying member method code with example usage: obj._is_valid_by_code(val) and returns: unknown