The branding symbol.

Assert that self is branded.

Configure prototype properties enumerability / writability / configurability.

Create a branded instance of an interface.

Create a converter for dictionaries.

Create a converter for enums.

Create a converter for interfaces.

Create a converter that makes the contained type nullable.

Create a converter that converts a Promise of the inner type.

Create a converter that converts a sequence of the inner type.

Throw an illegal constructor error.

Invoke a callback function.

Mix in the iterable declarations defined in WebIDL. https://heycam.github.io/webidl/#es-iterable

Assert that the a function has at least a required amount of arguments.

Get the WebIDL / ES type of a value.