{"ast_node_type":"other","tokens":[{"end":19,"kind":"keyword","start":0,"text":"///"}]}
    /// be allowed:
    /// in case there is an equal region that does not. For example, this should
    /// `fn f<'a: 'b, 'b: 'a>(x: *mut &'b i32) -> impl Sized + 'a { x }`