docs: def validate_response(self, iface_name, func_name, resp):
          """
          Validates that the response matches the return type for the function  
  
          Returns two element tuple: (bool, string)
  
          - `bool` - True if valid, False if not
          - `string` - Description of validation error, or None if valid
  
          :Parameters:
            iface_name
              Name of interface
            func_name
              Name of function
            resp
              Result from calling the function
          """
          self.interface(iface_name).function(func_name).validate_response(resp)