def METHOD_NAME(shape, nonzeros=None, dtype=None, name="placeholder", stype=None):
    """Construct an empty sparse tensor object.
    Parameters
    ----------
    shape: Tuple of Expr
        The shape of the tensor
    nonzeros: int
        The number of non-zero values
    dtype: str, optional
        The data type of the tensor
    name: str, optional
        The name hint of the tensor
    stype: str, optional
        The name storage type of the sparse tensor (e.g. csr, coo, ell)
    Returns
    -------
    tensor: SparsePlaceholderOp
        The created sparse tensor placeholder
    """
    shape = (shape,) if isinstance(shape, _expr.PrimExpr) else shape
    nonzeros = 0 if nonzeros is None else nonzeros
    dtype = float32 if dtype is None else dtype
    stype = "csr" if stype is None else stype
    ret = None
    if stype == "csr":
        ret = CSRPlaceholderOp(shape=shape, nonzeros=nonzeros, dtype=dtype, name=name)
    else:
        raise NotImplementedError(f"stype={stype} is not supported yet.")
    return ret