syntax_data: {"ast_node_type":"variable","tokens":[{"end":46,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:             let adt_kind = adt_def.adt_kind();
context_before:             debug!("print-type-size t: `{:?}` process adt", layout.ty);
context_after:             let adt_packed = adt_def.repr().pack.is_some();