error[E0391]: cycle detected when expanding type alias `Node1Value`
  --> fail/interface/trait/cyclic_impl.rs:3:46
   |
3  | #[graphql_interface(impl = Node2Value, for = Node2Value)]
   |                                              ^^^^^^^^^^
   |
note: ...which requires expanding type alias `Node2Value`...
  --> fail/interface/trait/cyclic_impl.rs:8:46
   |
8  | #[graphql_interface(impl = Node1Value, for = Node1Value)]
   |                                              ^^^^^^^^^^
   = note: ...which again requires expanding type alias `Node1Value`, completing the cycle
   = note: type aliases cannot be recursive
   = help: consider using a struct, enum, or union instead to break the cycle
   = help: see <https://doc.rust-lang.org/reference/types.html#recursive-types> for more information
note: cycle used when collecting item types in top-level module
  --> fail/interface/trait/cyclic_impl.rs:1:1
   |
1  | / use juniper::graphql_interface;
2  | |
3  | | #[graphql_interface(impl = Node2Value, for = Node2Value)]
4  | | trait Node1 {
...  |
12 | |
13 | | fn main() {}
   | |____________^
   = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information