How to animate path in svg.js?

Question

Animation

When creating animated elements, there was a problem with the location during animation, by location I do not mean the move method, but what is enclosed in the path.
The essence of the application is a certain line that I set through the path, and so when animating, I want the coordinates to change smoothly. the lamer's first thought was to simply do something like

var rect = draw.path('данные фигуры изначально')
rect.animate().path('анимация для изменения формы');

But as expected - it did not work, initially I tried to make a line that, after replacing the coordinates, was false to animate, how can this be implemented?