{"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"diag.subdiagnostic(VarHereDenote::Captured"}]}
                diag.subdiagnostic(VarHereDenote::Captured { span: upvar_span });
                diag.subdiagnostic(VarHereDenote::Defined { span: upvar_def_span });
            }