make existing fields required lists

Author: dlarocque

firebase-ai/CHANGELOG.md

@@ -1,5 +1,6 @@
 # Unreleased
-* [feature] Add support for Grounding with Google Search (#7042).
+* [feature] **Breaking Change**: Add support for Grounding with Google Search (#7042).
+    * **Action Required:** Update all references of `groundingAttributions`, `webSearchQueries`, `retrievalQueries` in `GroundingMetadata` to be non-optional.
 * [changed] Deprecate the `totalBillableCharacters` field (only usable with pre-2.0 models). (#7042)
 * [feature] Added support for extra schema properties like `title`, `minItems`, `maxItems`, `minimum`
  and `maximum`. As well as support for the `anyOf` schema. (#7013)

firebase-ai/src/main/kotlin/com/google/firebase/ai/type/Candidate.kt

@@ -312,11 +312,11 @@ public class FinishReason private constructor(public val name: String, public va
  * specific segments of the model's response are supported by the `groundingChunks`.
  */
 public class GroundingMetadata(
-  public val webSearchQueries: List<String>?,
+  public val webSearchQueries: List<String>,
   public val searchEntryPoint: SearchEntryPoint?,
-  public val retrievalQueries: List<String>?,
+  public val retrievalQueries: List<String>,
   @Deprecated("Use groundingChunks instead")
-  public val groundingAttribution: List<GroundingAttribution>?,
+  public val groundingAttribution: List<GroundingAttribution>,
   public val groundingChunks: List<GroundingChunk>,
   public val groundingSupports: List<GroundingSupport>,
 ) {
@@ -332,10 +332,10 @@ public class GroundingMetadata(
   ) {
     internal fun toPublic() =
       GroundingMetadata(
-        webSearchQueries = webSearchQueries,
+        webSearchQueries = webSearchQueries.orEmpty(),
         searchEntryPoint = searchEntryPoint?.toPublic(),
-        retrievalQueries = retrievalQueries,
-        groundingAttribution = groundingAttribution?.map { it.toPublic() },
+        retrievalQueries = retrievalQueries.orEmpty(),
+        groundingAttribution = groundingAttribution?.map { it.toPublic() }.orEmpty(),
         groundingChunks = groundingChunks?.map { it.toPublic() }.orEmpty(),
         groundingSupports = groundingSupports?.map { it.toPublic() }.orEmpty()
       )

firebase-ai/src/test/java/com/google/firebase/ai/VertexAIUnarySnapshotTests.kt

@@ -604,7 +604,7 @@ internal class VertexAIUnarySnapshotTests {
         val groundingMetadata = candidate.groundingMetadata
         groundingMetadata.shouldNotBeNull()
 
-        groundingMetadata.webSearchQueries?.first() shouldBe "current weather in London"
+        groundingMetadata.webSearchQueries.first() shouldBe "current weather in London"
         groundingMetadata.searchEntryPoint.shouldNotBeNull()
         groundingMetadata.searchEntryPoint?.renderedContent.shouldNotBeEmpty()