public com.google.protobuf.Timestamp getExpirationTime() {
      if (expirationTimeBuilder_ == null) {
        return expirationTime_ == null
            ? com.google.protobuf.Timestamp.getDefaultInstance()
            : expirationTime_;
      } else {
        return expirationTimeBuilder_.getMessage();
      }
    }
<pre>
The expiration time of the token.
</pre>

<code>.google.protobuf.Timestamp expiration_time = 2;</code>

@return The expirationTime.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/GenerateStreamHlsTokenResponse.java