Get the current interface layout file.

def uidump(self, local: _PATH = None) -> None:
        '''Get the current interface layout file.'''
        local = local if local else self._temp
        self._execute('-s', self.device_sn, 'shell', 'uiautomator',
                      'dump', '--compressed', '/data/local/tmp/uidump.xml')
        self.pull('/data/local/tmp/uidump.xml', local)
        ui = html.fromstring(open(local, 'rb').read())
        self._nodes = ui.iter(tag="node")