syntax_data: {"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"(\"sm4\","}]}
source_snippet:     ("sm4", Stable, &["avx2"]),
context_before:     ("sm3", Stable, &["avx"]),
context_after:     // This cannot actually be toggled, the ABI always fixes it, so it'd make little sense to