syntax_data: {"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"err.span_note(cx.tcx.def_span(def_id),"}]}
source_snippet:             err.span_note(cx.tcx.def_span(def_id), format!("constant `{const_name}` defined here"));
context_before:             );
context_after:             err.span_suggestion_verbose(