Referencing extension with an unknown id might result in errors at runtime.
The following extension points are supported:
com.intellij.advancedSetting in resource bundle advanced.setting.* keycom.intellij.experimentalFeature in Experiments.isFeatureEnabled()/setFeatureEnabled()com.intellij.notificationGroup in Notification constructor and NotificationGroupManager.getNotificationGroup()
com.intellij.registryKey in Registry methods key parametercom.intellij.toolWindow in resource bundle toolwindow.stripe.* key
Extension point name referencing its corresponding <extensionPoint> declaration in plugin.xml.
com.intellij.openapi.extensions.ExtensionPointName constructor and create()com.intellij.openapi.extensions.ProjectExtensionPointName constructorcom.intellij.openapi.util.KeyedExtensionCollector and inheritors constructor