def METHOD_NAME():
    # toInt
    assert F.toInt("9") == 9
    assert F.toInt("a") == 0
    assert F.toInt("") == 0
    # toFloat
    assert F.toFloat("9.4") == 9.4
    assert F.toFloat("") == 0.
    # toString
    assert F.toString(None) == ""
    assert F.toString("None") == ""
    assert F.toString("Joy") == "Joy"