feat: introduce Bigtable Admin V2 clients for Selective GAPIC

google-cloud-bigtable/pom.xml

@@ -281,7 +281,6 @@
     <dependency>
       <groupId>com.google.api.grpc</groupId>
       <artifactId>grpc-google-cloud-bigtable-admin-v2</artifactId>
-      <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>com.google.cloud</groupId>

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/admin/v2/BaseBigtableInstanceAdminClient.java

@@ -5249,7 +5249,7 @@ public final void deleteMaterializedView(DeleteMaterializedViewRequest request)
   }
 
   @Override
-  public final void close() {
+  public void close() {
     stub.close();
   }
 

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/admin/v2/BaseBigtableTableAdminClient.java

@@ -6414,7 +6414,7 @@ public final UnaryCallable<DeleteSchemaBundleRequest, Empty> deleteSchemaBundleC
   }
 
   @Override
-  public final void close() {
+  public void close() {
     stub.close();
   }
 

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/admin/v2/BigtableInstanceAdminClientV2.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.cloud.bigtable.admin.v2;
+
+import com.google.cloud.bigtable.admin.v2.stub.BigtableInstanceAdminStub;
+import java.io.IOException;
+
+/**
+ * Modern Cloud Bigtable Instance Admin Client.
+ *
+ * <p>This client extends the {@link BaseBigtableInstanceAdminClient} to provide a simplified and
+ * enhanced API surface for managing Cloud Bigtable instances and clusters.
+ */
+public class BigtableInstanceAdminClientV2 extends BaseBigtableInstanceAdminClient {
+
+  protected BigtableInstanceAdminClientV2(BaseBigtableInstanceAdminSettings settings)
+      throws IOException {
+    super(settings);
+  }
+
+  protected BigtableInstanceAdminClientV2(BigtableInstanceAdminStub stub) {
+    super(stub);
+  }
+
+  /** Constructs an instance of BigtableInstanceAdminClientV2 with the given settings. */
+  public static final BigtableInstanceAdminClientV2 create(
+      BaseBigtableInstanceAdminSettings settings) throws IOException {
+    return new BigtableInstanceAdminClientV2(settings);
+  }
+
+  /** Constructs an instance of BigtableInstanceAdminClientV2 with the given stub. */
+  public static final BigtableInstanceAdminClientV2 create(BigtableInstanceAdminStub stub) {
+    return new BigtableInstanceAdminClientV2(stub);
+  }
+}