code: function bodyMinSizeChanged() {
                      var bodyMinSize = {};
                      if (_isBody && _contentArrangeElement) {
                          bodyMinSize.w = parseToZeroOrNumber(_contentArrangeElement.css(_strMinMinus + _strWidth));
                          bodyMinSize.h = parseToZeroOrNumber(_contentArrangeElement.css(_strMinMinus + _strHeight));
                          bodyMinSize.c = checkCacheDouble(bodyMinSize, _bodyMinSizeCache);
                          bodyMinSize.f = true; //flag for "measured at least once"
                      }
                      _bodyMinSizeCache = bodyMinSize;
                      return bodyMinSize.c || false;
                  }
docs: ==== Update Detection ====// 
  Measures the min width and min height of the body element and refreshes the related cache.
  @returns {boolean} True if the min width or min height has changed, false otherwise.