def METHOD_NAME(self):
    parent = ConstraintsContainer(bounds=(500, 500), padding=20)
    one = Component(id="r", bgcolor=0xFF0000)
    two = Component(id="g", bgcolor=0x00FF00)
    three = Component(id="b", bgcolor=0x0000FF)
    parent.add(one, two, three, self.child_canvas)
    return parent