Contains a set of toggle-able web engine features.
The list supports passing around a set of [struct@Feature] objects and iterating over them:
```c g_autoptr(WebKitFeatureList) list =
get_experimental_features; for (gsize i = 0; i < webkit_feature_list_get_length(list): i++) { WebKitFeature *feature =
webkit_feature_list_get(list, i); // Do something with "feature". } ```
Lists of features can be obtained with [func@Settings.get_experimental_features], [func@Settings.get_development_features], and [
func@Settings.get_all_features].