public com.google.rpc.Status getIndexError() {
      if (indexErrorBuilder_ == null) {
        return indexError_ == null ? com.google.rpc.Status.getDefaultInstance() : indexError_;
      } else {
        return indexErrorBuilder_.getMessage();
      }
    }
<pre>
Output only. If there was an error with indexing the product set, the field
is populated.

This field is ignored when creating a ProductSet.
</pre>

<code>.google.rpc.Status index_error = 4 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>

@return The indexError.
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/ProductSet.java