stateAndFragmentLocalAndPrimaryFeaturePreferencesPlugin/PrimaryFeaturePreference = From the primary feature plugin directory via the plugin stateAndFragmentLocalAndPrimaryFeaturePreferencesPlugin
org.eclipse.core.runtime/SomeRandomPreference = For the runtime plugin only
stateAndFragmentLocalAndPrimaryFeaturePreferencesPlugin/commonStateAndFragmentLocalAndPrimaryFeaturePreference = Common preference from the primary feature of plugin stateAndFragmentLocalAndPrimaryFeaturePreferencesPlugin