Idea Summary
Provide an api to allow an application page to be locked from pl/sql.

Use Case
In multi developer environments we want to be able to lock pages in an application using plsql using an api

Preferred Solution (Optional)
Since the operation in apex internal code is fairly simple of adding and deleting this information on a specific table this could be exposed as part of the apex_util package.  just replicate the lock_page and unlock_page procedures from the wwv_flow_property_dev package