public Builder clearEnd() {
      bitField0_ = (bitField0_ & ~0x00000002);
      end_ = null;
      if (endBuilder_ != null) {
        endBuilder_.dispose();
        endBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
End data time.
</pre>

<code>.google.type.DateTime end = 2;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/DateTimeRange.java