def draw_no_data(self):
        """Write the no data text to the svg"""
        no_data = self.node(
            self.graph.nodes['text_overlay'],
            'text',
            x=self.graph.view.width / 2,
            y=self.graph.view.height / 2,
            class_='no_data'
        )
        no_data.text = self.graph.no_data_text
Write the no data text to the svg