syntax_data: {"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"\"enable"}]}
source_snippet:         "enable unsound and buggy MIR optimizations (default: no)"),
context_before:     unsound_mir_opts: bool = (false, parse_bool, [TRACKED],
context_after:     /// This name is kind of confusing: Most unstable options enable something themselves, while