[Enter description of this extension point] Used to register post-gen action for RSC. When RSC plugin is installed, generated .sql/.ddl files should be updated in preferences. The ID of the plugin contributing the preference helper. Value is restricted to the included enumeration. The class to run. Class must implement IPreferenceContributor [Enter extension point usage example here.] [Enter API information here.] [Enter information about supplied implementation of this extension point.]