syntax_data: {"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"(\"lahfsahf\","}]}
source_snippet:     ("lahfsahf", Unstable(sym::lahfsahf_target_feature), &[]),
context_before:     ("kl", Stable, &["sse2"]),
context_after:     ("lzcnt", Stable, &[]),