{"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"(unstable,"}]}
    (unstable, ermsb_target_feature, "1.49.0", Some(44839)),
    (unstable, csky_target_feature, "1.73.0", Some(44839)),
    (unstable, hexagon_target_feature, "1.27.0", Some(44839)),