# OptionalFeature

This type represents a feature that is marked as Experimental, meaning that you have to opt-in in order to use it. To read more about Experimental features, check [this](../../concepts/experimental-features) page.

The list of currently available optional features can be found in [this](../../optional-features/list-of-optional-features) table. The string that you need to pass in your configuration file is the value from the "Feature Identifier" column.
