private com.google.protobuf.SingleFieldBuilderV3<
              com.google.cloud.memorystore.v1.Instance.StateInfo.UpdateInfo,
              com.google.cloud.memorystore.v1.Instance.StateInfo.UpdateInfo.Builder,
              com.google.cloud.memorystore.v1.Instance.StateInfo.UpdateInfoOrBuilder>
          getUpdateInfoFieldBuilder() {
        if (updateInfoBuilder_ == null) {
          if (!(infoCase_ == 1)) {
            info_ =
                com.google.cloud.memorystore.v1.Instance.StateInfo.UpdateInfo.getDefaultInstance();
          }
          updateInfoBuilder_ =
              new com.google.protobuf.SingleFieldBuilderV3<
                  com.google.cloud.memorystore.v1.Instance.StateInfo.UpdateInfo,
                  com.google.cloud.memorystore.v1.Instance.StateInfo.UpdateInfo.Builder,
                  com.google.cloud.memorystore.v1.Instance.StateInfo.UpdateInfoOrBuilder>(
                  (com.google.cloud.memorystore.v1.Instance.StateInfo.UpdateInfo) info_,
                  getParentForChildren(),
                  isClean());
          info_ = null;
        }
        infoCase_ = 1;
        onChanged();
        return updateInfoBuilder_;
      }
<pre>
Output only. Describes ongoing update when instance state is UPDATING.
</pre>

<code>
.google.cloud.memorystore.v1.Instance.StateInfo.UpdateInfo update_info = 1 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-valkey/proto-google-cloud-valkey-v1/src/main/java/com/google/cloud/memorystore/v1/Instance.java