syntax_data: {"ast_node_type":"other","tokens":[{"end":35,"kind":"keyword","start":0,"text":"impl_def_id"}]}
source_snippet:         impl_def_id = Some(def_id);
context_before:             find_attr!(tcx.get_all_attrs(def_id), AttributeKind::AutomaticallyDerived(..));
context_after:     }