{"ast_node_type":"variable","tokens":[{"end":66,"kind":"keyword","start":0,"text":"let"}]}
        let position = (self.position.get() as u64).to_le_bytes();
    fn write_to_bytes_impl(self, dest: &mut [u8; 16]) {
        let len = (self.num_elems as u64).to_le_bytes();