Indicates a public API that is stable for callers to use, but has no guarantee of stability for
extension. Consequently, the API should only be extended within the package containing the API.
For example:
An interface marked with this annotation can have new methods added to it.
A non-final class with this annotation can be marked final.
A class with this annotation can have new abstract methods added.
a non-final method with this annotation can be marked final.
The list above is just for illustration purposes and is not exhaustive.
Adding this annotation to an API is considered API-breaking.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-04-09 UTC."],[[["This webpage lists the versions of the `InternalExtensionOnly` API, ranging from version 2.46.1 (latest) down to 2.1.2."],["The `InternalExtensionOnly` API is currently in a pre-GA (Beta) stage, implying potential limitations in support and compatibility between different versions."],["`InternalExtensionOnly` designates a public API as stable for use but not for extension outside of its own package."],["Modifying an API that is annotated with `InternalExtensionOnly` is considered an API-breaking change, despite it being stable for calling."],["The `InternalExtensionOnly` interface has a method `value()` that provides context information about why it was annotated as such, and returns a string."]]],[]]
