{"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"self.type_of_expr.get(expr).unwrap_or(&self.standard_types.unknown)"}]}
        self.type_of_expr.get(expr).unwrap_or(&self.standard_types.unknown)
    fn index(&self, expr: ExprId) -> &Ty {
    }