code: function () {
          var t = this.thumb;
  
          t.setXConstraint(t.leftConstraint, t.rightConstraint, t.xTickSize);
          t.setYConstraint(t.topConstraint, t.bottomConstraint, t.xTickSize);
      }
docs: Resets the X and Y contraints for the thumb.  Used in lieu of the thumb
  instance's inherited resetConstraints because some logic was not
  applicable.
  @method resetThumbConstraints
  @protected