syntax_data: {"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"(\"ermsb\","}]}
source_snippet:     ("ermsb", Unstable(sym::ermsb_target_feature), &[]),
context_before:     ("cmpxchg16b", Stable, &[]),
context_after:     ("f16c", Stable, &["avx"]),