+
+/**
+ * Add a default value for the 'Refresh' field for aggregator feed entities.
+ */
+function aggregator_update_8501() {
+ $definition_update_manager = \Drupal::entityDefinitionUpdateManager();
+ $field_definition = $definition_update_manager->getFieldStorageDefinition('refresh', 'aggregator_feed');
+ $field_definition->setDefaultValue(3600);
+ $definition_update_manager->updateFieldStorageDefinition($field_definition);
+}