syntax_data: {"ast_node_type":"other","tokens":[{"end":33,"kind":"keyword","start":0,"text":"(\"ssse3\","}]}
source_snippet:     ("ssse3", Stable, &["sse3"]),
context_before:     ("sse4a", Unstable(sym::sse4a_target_feature), &["sse3"]),
context_after:     ("tbm", Unstable(sym::tbm_target_feature), &[]),