public Builder setLocationId(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      locationId_ = value;
      bitField0_ |= 0x00000020;
      onChanged();
      return this;
    }
<pre>
Optional. Cloud region where annotation should take place. Supported cloud
regions are: `us-east1`, `us-west1`, `europe-west1`, `asia-east1`. If no
region is specified, the region will be determined based on video file
location.
</pre>

<code>string location_id = 5 [(.google.api.field_behavior) = OPTIONAL];</code>

@param value The locationId to set.
@return This builder for chaining.
java-video-intelligence/proto-google-cloud-video-intelligence-v1p3beta1/src/main/java/com/google/cloud/videointelligence/v1p3beta1/AnnotateVideoRequest.java