Renders the chart to an OmniCanvas `canvas <https://omnicanvas.readt\
        hedocs.io/en/latest/api/canvas.html#omnicanvas.canvas.Canvas>`_. This
        object can then be `saved <https://omnicanvas.readthedocs.io/en/latest/\
        api/canvas.html#omnicanvas.canvas.Canvas.save>`_ or `rendered <https://\
        omnicanvas.readthedocs.io/en/latest/api/canvas.html#omnicanvas.canvas.C\
        anvas.render>`_ as SVG.

def create(self):
        """Renders the chart to an OmniCanvas `canvas <https://omnicanvas.readt\
        hedocs.io/en/latest/api/canvas.html#omnicanvas.canvas.Canvas>`_. This
        object can then be `saved <https://omnicanvas.readthedocs.io/en/latest/\
        api/canvas.html#omnicanvas.canvas.Canvas.save>`_ or `rendered <https://\
        omnicanvas.readthedocs.io/en/latest/api/canvas.html#omnicanvas.canvas.C\
        anvas.render>`_ as SVG."""

        canvas = Canvas(self.width(), self.height())
        canvas.add_text(
         self.width() / 2, 0, self.title(),
         vertical_align="bottom", name="title"
        )
        return canvas