public Builder clearPartition() {
      bitField0_ = (bitField0_ & ~0x00000004);
      partition_ = null;
      if (partitionBuilder_ != null) {
        partitionBuilder_.dispose();
        partitionBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
Partition information in time and space for the sub-asset level annotation.
</pre>

<code>.google.cloud.visionai.v1.Partition partition = 3;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/UserSpecifiedAnnotation.java