When I try to build my plugin-project I get three class file not found errors. The files not found are UserDataHolder, Disposable and Computable. I have included a screenshot of the error messages.
If I look in the openapi.jar, it's true - the classes are not there. However, the src_openapi.zip does contain theses files.
By the way, I have no references to theses classes at all, so I guess they're referenced somewhere in the API?
I'm using build 9013. I have downloaded the development api, but I haven't included any jarfiles from it.