@ValidateLarchPlugin
def f2_chantler(element, energy, _larch=None):
    xdb = get_xraydb(_larch)
    return xdb._getChantler(element, energy, column='f2')
Check if x and y are connected somehow.
dataset/ETHPy150Open xraypy/xraylarch/plugins/xray/xraydb_plugin.py/f2_chantler--crossover with--dataset/ETHPy150Open sympy/sympy/sympy/functions/elementary/miscellaneous.py/MinMaxBase._is_connected