{"ast_node_type":"function","tokens":[{"end":57,"kind":"keyword","start":0,"text":"///"}]}
    /// fn foo<'a, 'b>(..) -> (Foo1<'a>, Foo2<'b>) { .. }
    /// type Foo2<'x> = impl Bar<'x> = BBB;  // <-- or this type BBB
    /// ```