By Brandy McDonnell Features Writer bmcdonnell@oklahoman.comIn the ballet world, performances of “The Nutcracker” herald the holidays, while many U.S. theater groups make “A Christmas Carol” their yuletide tradition. For opera companies, “Amahl and the Night Visitors” is the go-to Christmas classic, and this season, the fledgling Painted Sky Opera Company is performing it for the first time. “This is a show that is about the actual Christmas story; it's about the three wise men.Read more on NewsOK.com