public Builder addMuxStreamsBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      ensureMuxStreamsIsMutable();
      muxStreams_.add(value);
      bitField0_ |= 0x00000004;
      onChanged();
      return this;
    }
<pre>
Required. List of `MuxStream`
[key][google.cloud.video.livestream.v1.MuxStream.key]s that should appear
in this manifest.

- For HLS, either `fmp4` or `ts` mux streams can be specified but not
mixed.
- For DASH, only `fmp4` mux streams can be specified.
</pre>

<code>repeated string mux_streams = 3 [(.google.api.field_behavior) = REQUIRED];</code>

@param value The bytes of the muxStreams to add.
@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