code: @SuppressWarnings("WeakerAccess")
    public UpdateInstanceRequest setAllLabels(@Nonnull Map<String, String> labels) {
      Preconditions.checkNotNull(labels, "labels can't be null");
      builder.getInstanceBuilder().clearLabels();
      builder.getInstanceBuilder().putAllLabels(labels);
      updateFieldMask(Instance.LABELS_FIELD_NUMBER);
  
      return this;
    }
docs: Replaces the labels associated with the instance.
  
  @see <a href="https://cloud.google.com/bigtable/docs/creating-managing-labels">For more
  details</a>