How to use the xlsxwriter.shape.Shape._get_fill_properties function in XlsxWriter

def _get_area_properties(self, options):
        # Convert user area properties to the structure required internally.
        area = {}

        # Set the line properties for the chartarea.
        line = Shape._get_line_properties(options.get('line'))

        # Allow 'border' as a synonym for 'line'.
        if options.get('border'):
            line = Shape._get_line_properties(options['border'])

        # Set the fill properties for the chartarea.
        fill = Shape._get_fill_properties(options.get('fill'))

        # Set the pattern fill properties for the series.
        pattern = Shape._get_pattern_properties(options.get('pattern'))

        # Set the gradient fill properties for the series.
        gradient = Shape._get_gradient_properties(options.get('gradient'))

        # Pattern fill overrides solid fill.
        if pattern:
            self.fill = None

        # Gradient fill overrides the solid and pattern fill.
        if gradient:
            pattern = None
            fill = None

legend['layout'] = self._get_layout_properties(options.get('layout'),
                                                       False)

        # Turn off the legend.
        if options.get('none'):
            legend['position'] = 'none'

        # Set the line properties for the legend.
        line = Shape._get_line_properties(options.get('line'))

        # Allow 'border' as a synonym for 'line'.
        if options.get('border'):
            line = Shape._get_line_properties(options['border'])

        # Set the fill properties for the legend.
        fill = Shape._get_fill_properties(options.get('fill'))

        # Set the pattern fill properties for the series.
        pattern = Shape._get_pattern_properties(options.get('pattern'))

        # Set the gradient fill properties for the series.
        gradient = Shape._get_gradient_properties(options.get('gradient'))

        # Pattern fill overrides solid fill.
        if pattern:
            self.fill = None

        # Gradient fill overrides the solid and pattern fill.
        if gradient:
            pattern = None
            fill = None

if marker_type in types:
                marker['type'] = types[marker_type]
            else:
                warn("Unknown marker type '%s" % marker_type)
                return

        # Set the line properties for the marker.
        line = Shape._get_line_properties(marker.get('line'))

        # Allow 'border' as a synonym for 'line'.
        if 'border' in marker:
            line = Shape._get_line_properties(marker['border'])

        # Set the fill properties for the marker.
        fill = Shape._get_fill_properties(marker.get('fill'))

        # Set the pattern fill properties for the series.
        pattern = Shape._get_pattern_properties(marker.get('pattern'))

        # Set the gradient fill properties for the series.
        gradient = Shape._get_gradient_properties(marker.get('gradient'))

        # Pattern fill overrides solid fill.
        if pattern:
            self.fill = None

        # Gradient fill overrides the solid and pattern fill.
        if gradient:
            pattern = None
            fill = None

if trend_type in types:
            trendline['type'] = types[trend_type]
        else:
            warn("Unknown trendline type '%s'" % trend_type)
            return

        # Set the line properties for the trendline.
        line = Shape._get_line_properties(trendline.get('line'))

        # Allow 'border' as a synonym for 'line'.
        if 'border' in trendline:
            line = Shape._get_line_properties(trendline['border'])

        # Set the fill properties for the trendline.
        fill = Shape._get_fill_properties(trendline.get('fill'))

        # Set the pattern fill properties for the series.
        pattern = Shape._get_pattern_properties(trendline.get('pattern'))

        # Set the gradient fill properties for the series.
        gradient = Shape._get_gradient_properties(trendline.get('gradient'))

        # Pattern fill overrides solid fill.
        if pattern:
            self.fill = None

        # Gradient fill overrides the solid and pattern fill.
        if gradient:
            pattern = None
            fill = None