code: @Deprecated
      public java.util.List<CaptionSource> getCaptionSources() {
          if (captionSources == null) {
              captionSources = new com.amazonaws.internal.SdkInternalList<CaptionSource>();
          }
          return captionSources;
      }
docs: <p>
  Source files for the input sidecar captions used during the transcoding process. To omit all sidecar captions,
  leave <code>CaptionSources</code> blank.
  </p>
  
  @return Source files for the input sidecar captions used during the transcoding process. To omit all sidecar
  captions, leave <code>CaptionSources</code> blank.