Retrieve recorded computation history as `Symbol`.

    Parameters
    ----------
    x : NDArray
        Array representing the head of computation graph.

    Returns
    -------
    Symbol
        The retrieved Symbol.

def get_symbol(x):
    """Retrieve recorded computation history as `Symbol`.

    Parameters
    ----------
    x : NDArray
        Array representing the head of computation graph.

    Returns
    -------
    Symbol
        The retrieved Symbol.
    """
    hdl = SymbolHandle()
    check_call(_LIB.MXAutogradGetSymbol(x.handle, ctypes.byref(hdl)))
    return Symbol(hdl)