public Builder addElementaryStreamsBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      ensureElementaryStreamsIsMutable();
      elementaryStreams_.add(value);
      bitField0_ |= 0x00000008;
      onChanged();
      return this;
    }
<pre>
List of `ElementaryStream.key`s multiplexed in this stream.
</pre>

<code>repeated string elementary_streams = 4;</code>

@param value The bytes of the elementaryStreams to add.
@return This builder for chaining.
java-video-transcoder/proto-google-cloud-video-transcoder-v1/src/main/java/com/google/cloud/video/transcoder/v1/MuxStream.java