def METHOD_NAME(client, name=None):
    """Get information about NVMe controllers.
    Args:
        name: NVMe controller name to query (optional; if omitted, query all NVMe controllers)
    Returns:
        List of NVMe controller information objects.
    """
    params = {}
    if name:
        params['name'] = name
    return client.call('bdev_nvme_get_controllers', params)