code: def get_required_parameter_definitions(self):
          
          required = {}
          for name, attrs in self.get_parameter_definitions().items():
              if "Default" not in attrs:
                  required[name] = attrs
          return required
docs: Returns all template parameters that do not have a default value.
  
          Returns:
              dict: dict of required CloudFormation Parameters for the blueprint.
                  Will be a dictionary of <parameter name>: <parameter
                  attributes>.