def METHOD_NAME(self, mode=None):
    qio = QemuIoInteractive('-r', '-f', 'raw', nbd_uri)
    self.assertReadOk(qio.cmd('read 0 512'))
    result = self.remove_export('exp', mode)
    self.assertExistingClients(result)
    self.assertReadOk(qio.cmd('read 0 512'))
    qio.close()
    result = self.remove_export('exp', mode)
    self.assert_qmp(result, 'return', {})
    self.assertExportNotFound('exp')