private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.memorystore.v1beta.Instance,
            com.google.cloud.memorystore.v1beta.Instance.Builder,
            com.google.cloud.memorystore.v1beta.InstanceOrBuilder>
        getInstanceFieldBuilder() {
      if (instanceBuilder_ == null) {
        instanceBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.memorystore.v1beta.Instance,
                com.google.cloud.memorystore.v1beta.Instance.Builder,
                com.google.cloud.memorystore.v1beta.InstanceOrBuilder>(
                getInstance(), getParentForChildren(), isClean());
        instance_ = null;
      }
      return instanceBuilder_;
    }
<pre>
Required. The instance to update.
</pre>

<code>
.google.cloud.memorystore.v1beta.Instance instance = 2 [(.google.api.field_behavior) = REQUIRED];
</code>
java-valkey/proto-google-cloud-valkey-v1beta/src/main/java/com/google/cloud/memorystore/v1beta/UpdateInstanceRequest.java