syntax_data: {"ast_node_type":"variable","tokens":[{"end":81,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let base = self.tcx.mk_place_downcast_unnamed(self_place, variant_index);
context_before:         let self_place = Place::from(SELF_ARG);
context_after:         let mut projection = base.projection.to_vec();