syntax_data: {"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"(\"pauth-lr\","}]}
source_snippet:     ("pauth-lr", Unstable(sym::aarch64_unstable_target_feature), &[]),
context_before:     // FEAT_PAuth_LR
context_after:     // FEAT_PMUv3