A variadic argument list. The first argument (args[0]) is the optional
value parameter. Its presence is detected via args.length, allowing
the function to distinguish between an explicitly passed undefined value
and a completely omitted argument.
Whether the passed value features the built-in type-identity.
Does approve whether the passed value features the type-identity of any built-in type that is ...the passed value is an instance of one of the language core's built-in types and either does not have any
Symbol.toStringTagrelated slots or features just the type's standard-conform defaultSymbol.toStringTagproperty-descriptor.