{"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"self.dcx().emit_err(crate::errors::ReturnTypeNotationIllegalParam::Const"}]}
                        self.dcx().emit_err(crate::errors::ReturnTypeNotationIllegalParam::Const {
                    let guar = *emitted_bad_param_err.get_or_insert_with(|| {
                            span: path_span,