{"ast_node_type":"function","tokens":[{"end":55,"kind":"keyword","start":0,"text":"fn"}]}
    fn encode(&self, e: &mut EncodeContext<'a, 'tcx>) {
impl<'a, 'tcx, T> Encodable<EncodeContext<'a, 'tcx>> for LazyArray<T> {
        e.emit_usize(self.num_elems);