Get an evaluation parameter value that has been stored in meta.

        Args:
            parameter_name (string): The name of the parameter to store.
            default_value (any): The default value to be returned if the parameter is not found.

        Returns:
            The current value of the evaluation parameter.

def get_evaluation_parameter(self, parameter_name, default_value=None):
        """Get an evaluation parameter value that has been stored in meta.

        Args:
            parameter_name (string): The name of the parameter to store.
            default_value (any): The default value to be returned if the parameter is not found.

        Returns:
            The current value of the evaluation parameter.
        """
        if "evaluation_parameters" in self._expectations_config and \
                parameter_name in self._expectations_config['evaluation_parameters']:
            return self._expectations_config['evaluation_parameters'][parameter_name]
        else:
            return default_value