syntax_data: {"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // constructing the top-level projection predicate.
context_before:             // bounds of the RPITIT. Shift these binders back out when
context_after:             let shifted_alias_ty = fold_regions(self.tcx, unshifted_alias_ty, |re, depth| {