{"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"self.inner.borrow_mut().float_unification_table().new_key(ty::FloatVarValue::Unknown);"}]}
            self.inner.borrow_mut().float_unification_table().new_key(ty::FloatVarValue::Unknown);
        let next_float_var_id =
        Ty::new_float_var(self.tcx, next_float_var_id)