Hello.

The plugin backward compatibility was dramatically broken by commit: https://github.com/jenkinsci/shelve-project-plugin/commit/01bd4c4f1b41fb97704558362e16c085d3dee83c 

for next API:

• constructor org.jvnet.hudson.plugins.shelveproject.DeleteProjectExecutable(Queue.Task, String[]): became non-public
• constructor org.jvnet.hudson.plugins.shelveproject.DeleteProjectTask(String[]): became non-public
• constructor org.jvnet.hudson.plugins.shelveproject.UnshelveProjectExecutable(Queue.Task, String[]): became non-public
• constructor org.jvnet.hudson.plugins.shelveproject.UnshelveProjectTask(String[]): became non-public

We use the API. Could you, please, revert the API changes in next release?