{"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"CallableDefId::FunctionId(func_id).to_chalk(self.db),"}]}
                        CallableDefId::FunctionId(func_id).to_chalk(self.db),
                    let ty = chalk_ir::TyKind::FnDef(
                        generic_args,