code: def invert_if_negative(self):
          
          invertIfNegative = self._element.invertIfNegative
          if invertIfNegative is None:
              return True
          return invertIfNegative.val
docs: |True| if a point having a value less than zero should appear with a
          fill different than those with a positive value. |False| if the fill
          should be the same regardless of the bar's value. When |True|, a bar
          with a solid fill appears with white fill; in a bar with gradient
          fill, the direction of the gradient is reversed, e.g. dark -> light
          instead of light -> dark. The term "invert" here should be understood
          to mean "invert the *direction* of the *fill gradient*".