{"ast_node_type":"function","tokens":[{"end":69,"kind":"keyword","start":0,"text":"fn"}]}
    fn hash_stable(&self, ctx: &mut CTX, hasher: &mut StableHasher) {
impl<T1: HashStable<CTX>, T2: HashStable<CTX>, CTX> HashStable<CTX> for (T1, T2) {
        let (ref _0, ref _1) = *self;