def METHOD_NAME(self, system, time, current_step: int):
    if current_step % self.every == 0:
        self.callback_params["time"].append(time)
        self.callback_params["step"].append(current_step)
        self.callback_params["position"].append(
            system.position_collection.copy()
        )
        self.callback_params["velocity"].append(
            system.velocity_collection.copy()
        )
    return