fac4c32530
This introduces an `extension_type` yaml key to the dynamic interface to be able to directly refer to extension type declarations. The validator then uses the key to search differently for the corresponding API. BUG=b/483895271 TEST=updated extension_type2 to explicitly use this new API. Change-Id: I641b7491e47c031e13271825a115e75fb798c0ae Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/480780 Reviewed-by: Alexander Markov <alexmarkov@google.com> Commit-Queue: Sigmund Cherem <sigmund@google.com>