syntax_data: {"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"assert_default_hashing_controls(ctx,"}]}
source_snippet:         assert_default_hashing_controls(ctx, "ExpnId");
context_before:     fn hash_stable(&self, ctx: &mut CTX, hasher: &mut StableHasher) {
context_after:         let hash = if *self == ExpnId::root() {