error: Validation error: #[document_type_parameters] can only be used once per item. Remove the duplicate attribute
 --> tests/ui/duplicate_document_type_parameters.rs:5:1
  |
5 | #[document_type_parameters("Type A")]
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: this error originates in the attribute macro `document_type_parameters` (in Nightly builds, run with -Z macro-backtrace for more info)
