{"ast_node_type":"function","tokens":[{"end":68,"kind":"keyword","start":0,"text":"fn"}]}
    fn const_uint_big(&self, t: Self::Type, u: u128) -> Self::Value;
    fn const_uint(&self, t: Self::Type, i: u64) -> Self::Value;
    fn const_real(&self, t: Self::Type, val: f64) -> Self::Value;