def get_data(self, element, ranges=None, empty=None):
        if empty:
            return dict(xs=[], ys=[]), self._mapping

        xvals = element.dimension_values(0)
        mean = element.dimension_values(1)
        neg_error = element.dimension_values(2)
        pos_idx = 3 if 3 > len(element.dimensions()) else 2
        pos_error = element.dimension_values(pos_idx)

        lower = mean - neg_error
        upper = mean + pos_error
        band_x = np.append(xvals, xvals[::-1])
        band_y = np.append(lower, upper[::-1])
        return dict(xs=[band_x], ys=[band_y]), self._mapping
dataset/ETHPy150Open ioam/holoviews/holoviews/plotting/bokeh/chart.py/SpreadPlot.get_data/swapped operands of `>`