syntax_data: {"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // We want the type_id be independent of the types free regions, so we
context_before:     pub fn type_id_hash(self, ty: Ty<'tcx>) -> Hash128 {
context_after:         // erase them. The erase_regions() call will also anonymize bound