def axes(self):
        """
        Returns all the axes that have been defined for this chart.
        
        :return     [<projexui.widgets.xchart.XChartAxis>, ..]
        """
        out = self._axes[:]
        if self._horizontalAxis:
            out.append(self._horizontalAxis)
        if self._verticalAxis:
            out.append(self._verticalAxis)
        return out