{"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"//"}]}
                // used in a path such as `Foo::<T, U>::new()` will
                // e.g., `struct Foo<A, B, C = (A, B)>(...);` when
                // use an inference variable for `C` with `[T, U]`