{"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"Some(\"subsumed"}]}
     Some("subsumed by `#![feature(allocator_internals)]`")),
    (removed, needs_allocator, "1.4.0", Some(27389),
    /// Allows use of unary negate on unsigned integers, e.g., -e for e: u8