syntax_data: {"ast_node_type":"variable","tokens":[{"end":22,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let adt_def_span =
context_before:     };
context_after:         tcx.hir_get_if_local(def.did()).and_then(|node| node.ident()).map(|ident| ident.span);