public Builder clearAttributes() {
      if (attributesBuilder_ == null) {
        attributes_ = java.util.Collections.emptyList();
        bitField0_ = (bitField0_ & ~0x00000004);
        onChanged();
      } else {
        attributesBuilder_.clear();
      }
      return this;
    }
<pre>
Optional. Attributes in the track level.
</pre>

<code>
repeated .google.cloud.videointelligence.v1.DetectedAttribute attributes = 3 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-video-intelligence/proto-google-cloud-video-intelligence-v1/src/main/java/com/google/cloud/videointelligence/v1/Track.java