syntax_data: {"ast_node_type":"variable","tokens":[{"end":93,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let place_builder = unpack!(block = self.as_read_only_place_builder(block, expr_id));
context_before:     ) -> BlockAnd<Place<'tcx>> {
context_after:         block.and(place_builder.to_place(self))