{"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"(unstable,"}]}
    (unstable, custom_test_frameworks, "1.30.0", Some(50297)),
    /// Allows custom test frameworks with `#![test_runner]` and `#[test_case]`.
    /// Allows declarative macros 2.0 (`macro`).