def METHOD_NAME() -> tiledb.Ctx:
    """Build a TileDB context starting with reasonable defaults,
    and overriding and updating with user-provided config options.
    """
    # Note: Defaults must provide positive out-of-the-box UX!
    cfg: Dict[str, Union[str, float]] = {
        "sm.mem.reader.sparse_global_order.ratio_array_data": 0.3
    }
    return tiledb.Ctx(cfg)