{"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"dcx.emit_err(errors::ToolWasAlreadyRegistered"}]}
                        dcx.emit_err(errors::ToolWasAlreadyRegistered {
                    if let Some(old_ident) = registered_tools.replace(ident) {
                            span: ident.span,