{"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"(Safe)"}]}
    (Safe)           => { exp!(@kw, Safe,       KwSafe) };
    (Reuse)          => { exp!(@kw, Reuse,      KwReuse) };
    (SelfUpper)      => { exp!(@kw, SelfUpper,  KwSelfUpper) };