code: public void setCornerTreatments(
              CornerTreatment topLeftCorner,
              CornerTreatment topRightCorner,
              CornerTreatment bottomRightCorner,
              CornerTreatment bottomLeftCorner) {
          this.topLeftCorner = topLeftCorner;
          this.topRightCorner = topRightCorner;
          this.bottomRightCorner = bottomRightCorner;
          this.bottomLeftCorner = bottomLeftCorner;
      }
docs: Sets corner treatments.
  
  @param topLeftCorner     the corner treatment to use in the top-left corner.
  @param topRightCorner    the corner treatment to use in the top-right corner.
  @param bottomRightCorner the corner treatment to use in the bottom-right corner.
  @param bottomLeftCorner  the corner treatment to use in the bottom-left corner.