@java.lang.Override
    public final Builder mergeUnknownFields(
        final com.google.protobuf.UnknownFieldSet unknownFields) {
      return super.mergeUnknownFields(unknownFields);
    }
<pre>
Optional. A unique key for this manifest.
</pre>

<code>string key = 7 [(.google.api.field_behavior) = OPTIONAL];</code>

@param value The bytes for key to set.
@return This builder for chaining.
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/Manifest.java