@java.lang.Override
  public boolean hasIndexTime() {
    return ((bitField0_ & 0x00000001) != 0);
  }
<pre>
Timestamp of the index which provided these results. Products added to the
product set and products removed from the product set after this time are
not reflected in the current results.
</pre>

<code>.google.protobuf.Timestamp index_time = 2;</code>

@return Whether the indexTime field is set.
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/ProductSearchResults.java