@java.lang.Override
  public Builder toBuilder() {
    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
  }
<pre>
Input only. Token key for the Akamai CDN edge configuration.
</pre>

<code>bytes token_key = 1 [(.google.api.field_behavior) = INPUT_ONLY];</code>

@return The tokenKey.
java-video-stitcher/proto-google-cloud-video-stitcher-v1/src/main/java/com/google/cloud/video/stitcher/v1/AkamaiCdnKey.java