public String getPassthroughControl() {
        return this.passthroughControl;
    }
When set to WHEN_POSSIBLE, input DD+ audio will be passed through if it is present on the input. this detection
is dynamic over the life of the transcode. Inputs that alternate between DD+ and non-DD+ content will have a
consistent DD+ output as the system alternates between passthrough and encoding.

@return When set to WHEN_POSSIBLE, input DD+ audio will be passed through if it is present on the input. this
        detection is dynamic over the life of the transcode. Inputs that alternate between DD+ and non-DD+
        content will have a consistent DD+ output as the system alternates between passthrough and encoding.
@see Eac3PassthroughControl
aws-java-sdk-mediaconvert/src/main/java/com/amazonaws/services/mediaconvert/model/Eac3Settings.java