@java.lang.Override
  public boolean hasDatetimeValue() {
    return valueCase_ == 3;
  }
<pre>
Datetime type value.
</pre>

<code>.google.type.DateTime datetime_value = 3;</code>

@return Whether the datetimeValue field is set.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/FacetValue.java