# 19.2.0 - [changed] Added support for type wildcards in GenericTypeIndicator, expanding our custom class serialization to include classes with wildcard generics (#792). # 19.1.1 - [fixed] Fixed a crash that occurred when we attempted to start a network connection during app shutdown (#672). # 19.1.0 - [feature] Added support for the Firebase Database Emulator. To connect to the emulator, specify "http:///?ns=" as your Database URL (via `FirebaseDatabase.getInstance(String)`). Note that if you are running the Database Emulator on "localhost" and connecting from an app that is running inside an Android Emulator, the emulator host will be "10.0.2.2" followed by its port. # 18.0.1 - [changed] The SDK now reports the correct version number (via `FirebaseDatabase.getSdkVersion()`). # 17.0.0 - [changed] Added `@RestrictTo` annotations to discourage the use of APIs that are not public. This affects internal APIs that were previously obfuscated and are not mentioned in our documentation. - [changed] Improved error messages for certain Number types that are not supported by our serialization layer (#272). - [internal] Updated the SDK initialization process and removed usages of deprecated method. - [changed] Added missing nullability annotations for better Kotlin interop. - [internal] Removed `@PublicApi` annotations as they are no longer enforced and have no semantic meaning. # 16.0.6 - [fixed] Fixed an issue that could cause a NullPointerException during the initial handshake with the Firebase backend (#119).