syntax_data: {"ast_node_type":"variable","tokens":[{"end":67,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let dropless_arena = rustc_arena::DroplessArena::default();
context_before:         // here because it performs normalization and const evaluation.
context_after:         let typeck_results = self.tcx.typeck(self.def_id);