def export(self, nidm_version, export_dir):
        """
        Create prov entities and activities.
        """
        # Create "Model Parameter estimation" activity
        self.add_attributes((
            (PROV['type'], self.type),
            (NIDM_WITH_ESTIMATION_METHOD, self.estimation_method),
            (PROV['label'], self.label)))
Create prov entities and activities.