syntax_data: {"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"function_return:"}]}
source_snippet:     function_return: FunctionReturn = (FunctionReturn::default(), parse_function_return, [TRACKED],
context_before:         "force all crates to be `rustc_private` unstable (default: no)"),
context_after:         "replace returns with jumps to `__x86_return_thunk` (default: `keep`)"),