syntax_data: {"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"use_sync_unwind:"}]}
source_snippet:     use_sync_unwind: Option<bool> = (None, parse_opt_bool, [TRACKED],
context_before:         "use legacy .ctors section for initializers rather than .init_array"),
context_after:         "Generate sync unwind tables instead of async unwind tables (default: no)"),