syntax_data: {"ast_node_type":"variable","tokens":[{"end":59,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let record = |kind, packed, opt_discr_size, variants| {
context_before:     // (delay format until we actually need it)
context_after:         let type_desc = with_no_trimmed_paths!(format!("{}", layout.ty));