def METHOD_NAME():
    def test(a):
        return a
    interact_pane = interactive(test, a=(0, 4, .1, 0))
    widget = interact_pane._widgets['a']
    assert isinstance(widget, widgets.FloatSlider)
    assert widget.value == 0
    assert widget.start == 0
    assert widget.step == .1
    assert widget.end == 4