code: @Nonnull
    public CSSMediaList addMedia (@Nonnull final ECSSMedium... aMediaList)
    {
      ValueEnforcer.notNull (aMediaList, "MediaList");
  
      m_aMedia.addAll (aMediaList);
      return this;
    }
docs: Add a media list to the list
  
  @param aMediaList
  The media list to be added. May not be <code>null</code>.
  @return <code>this</code>
  @since 3.8.3