Function create_heap_buffer_source_with_length

pub(crate) fn create_heap_buffer_source_with_length<T>(
    cx: JSContext,
    len: u32,
    can_gc: CanGc,
) -> Fallible<HeapBufferSource<T>>
where
    T: TypedArrayElement + TypedArrayElementCreator,
    T::Element: Clone + Copy,