{"ast_node_type":"impl","tokens":[{"end":68,"kind":"keyword","start":0,"text":"///"}]}
    /// type Foo2<'x> = impl Bar<'x> = BBB;  // <-- or this type BBB
    /// type Foo1<'x> = impl Bar<'x> = AAA;  // <-- this type AAA
    /// fn foo<'a, 'b>(..) -> (Foo1<'a>, Foo2<'b>) { .. }