{"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"gate_all!(ergonomic_clones,"}]}
    gate_all!(ergonomic_clones, "ergonomic clones are experimental");
    gate_all!(builtin_syntax, "`builtin #` syntax is unstable");
    gate_all!(explicit_tail_calls, "`become` expression is experimental");