Resource locking custom protocol plugins

URLStreamHandlerWithLockPluginExtension allows the developer to work with a protocol that he designed for retrieving and storing files and lock a resource on opening it in <oXygen/>. This type of plugin extends the custom protocol plugin type URLStreamHandlerPluginExtension with resource locking support. The plugin receives callbacks following the simple protocol for resource locking and unlocking imposed by <oXygen/> as you can read in the developer manual. There are two additional methods that must be implemented: