private com.google.protobuf.RepeatedFieldBuilderV3<
            com.google.cloud.video.livestream.v1.AudioStream.AudioMapping,
            com.google.cloud.video.livestream.v1.AudioStream.AudioMapping.Builder,
            com.google.cloud.video.livestream.v1.AudioStream.AudioMappingOrBuilder>
        getMappingFieldBuilder() {
      if (mappingBuilder_ == null) {
        mappingBuilder_ =
            new com.google.protobuf.RepeatedFieldBuilderV3<
                com.google.cloud.video.livestream.v1.AudioStream.AudioMapping,
                com.google.cloud.video.livestream.v1.AudioStream.AudioMapping.Builder,
                com.google.cloud.video.livestream.v1.AudioStream.AudioMappingOrBuilder>(
                mapping_, ((bitField0_ & 0x00000020) != 0), getParentForChildren(), isClean());
        mapping_ = null;
      }
      return mappingBuilder_;
    }
<pre>
The mapping for the input streams and audio channels.
</pre>

<code>repeated .google.cloud.video.livestream.v1.AudioStream.AudioMapping mapping = 5;</code>
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/AudioStream.java