How to use the svglib.svglib.NoStrokePath function in svglib

def test_symbol_node(self):
        drawing = svglib.svg2rlg(io.StringIO(textwrap.dedent(u'''\
            
            <svg viewBox="0 0 100 100" height="600" width="900" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg">
                <defs>
                    <symbol id="X">
                        <path d="M 0,-100 V 0 H 50"></path>
                    </symbol>
                </defs>
                
            </svg>
        ''')))
        use_group = drawing.contents[0].contents[0].contents[0]
        assert isinstance(use_group.contents[0].contents[0], svglib.NoStrokePath)
        assert isinstance(use_group.contents[0].contents[1], Path)

else:
                logger.debug("Suspicious path operator: %s" % op)
            lastop = op

        gr = Group()
        self.applyStyleOnShape(path, node)

        if path.operators[-1] != _CLOSEPATH:
            unclosed_subpath_pointers.append(len(path.operators))

        if unclosed_subpath_pointers and path.fillColor is not None:
            # ReportLab doesn't fill unclosed paths, so we are creating a copy
            # of the path with all subpaths closed, but without stroke.
            # https://bitbucket.org/rptlab/reportlab/issues/99/
            closed_path = NoStrokePath(copy_from=path)
            for pointer in reversed(unclosed_subpath_pointers):
                closed_path.operators.insert(pointer, _CLOSEPATH)
            gr.add(closed_path)
            path.fillColor = None

        gr.add(path)
        return gr