public Builder clearExpireTime() {
      bitField0_ = (bitField0_ & ~0x00000008);
      expireTime_ = null;
      if (expireTimeBuilder_ != null) {
        expireTimeBuilder_.dispose();
        expireTimeBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
The lease expire time.
</pre>

<code>.google.protobuf.Timestamp expire_time = 4;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/Lease.java