syntax_data: {"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"(\"sha\","}]}
source_snippet:     ("sha", Stable, &["sse2"]),
context_before:     ("rtm", Unstable(sym::rtm_target_feature), &[]),
context_after:     ("sha512", Stable, &["avx2"]),