public java.lang.String getKey() {
      java.lang.Object ref = key_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        key_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
<pre>
A unique key for this multiplexed stream. HLS media manifests will be
named `MuxStream.key` with the `.m3u8` extension suffix.
</pre>

<code>string key = 1;</code>

@return The key.
java-video-transcoder/proto-google-cloud-video-transcoder-v1/src/main/java/com/google/cloud/video/transcoder/v1/MuxStream.java