syntax_data: {"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // binder depth, and if we were to walk `shifted_alias_ty` instead, we'd
context_before:             // We walk the *un-shifted* alias ty, because we're tracking the de bruijn
context_after:             // have to reset `self.depth` back to `ty::INNERMOST` or something. It's