code: public void setCaptionLanguageMappings(java.util.Collection<CaptionLanguageMapping> captionLanguageMappings) {
          if (captionLanguageMappings == null) {
              this.captionLanguageMappings = null;
              return;
          }
  
          this.captionLanguageMappings = new java.util.ArrayList<CaptionLanguageMapping>(captionLanguageMappings);
      }
docs: Mapping of up to 4 caption channels to caption languages. Is only meaningful if captionLanguageSetting is set to
  "insert".
  
  @param captionLanguageMappings
  Mapping of up to 4 caption channels to caption languages. Is only meaningful if captionLanguageSetting is
  set to "insert".