syntax_data: {"ast_node_type":"variable","tokens":[{"end":61,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let mut p = FmtPrinter::new(tcx, Namespace::ValueNS);
context_before:         let literal = tcx.lift(c).unwrap();
context_after:         p.print_alloc_ids = true;