Defining custom AnimatedProperty class has caveat

[PROgram52bc]

There is no guarantee that the custom AnimatedProperty child class will use a certain convention, and one would have to look for the source code or documentation to use any customized AnimatedProperty.

        self.register_child_property(
            'velocity',
            LerpValue(
                start_velocity,
                acceleration,
                max_frame))

For example, in this case, it is difficult to know the actual child_property names for the 'velocity' property registered.