{"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"result.make_expr().map(Some).map(AstFragment::OptExpr),"}]}
                        result.make_expr().map(Some).map(AstFragment::OptExpr),
                    AstFragmentKind::OptExpr =>
                    AstFragmentKind::MethodReceiverExpr =>