def get_arc_labels(self, arcs):
    (top_arc, bottom_arc) = arcs
    derivative = TextMobject('Derivative')
    derivative.next_to(top_arc, UP)
    antiderivative = TextMobject("``Antiderivative''")
    antiderivative.next_to(bottom_arc, DOWN)
    antiderivative.set_color(bottom_arc.get_color())
    return VGroup(derivative, antiderivative)
def get_arc_labels(self, arcs):
    (top_arc, bottom_arc) = arcs
    derivative = TextMobject('Derivative')
    derivative.next_to(top_arc, UP)
    antiderivative = TextMobject("``Antiderivative")
    antiderivative.next_to(bottom_arc, DOWN)
    antiderivative.set_color(bottom_arc.get_color())
    return VGroup(derivative, antiderivative)