Function from_depends 

pub fn from_depends<V: TowerValue>(
    value: Depends<Branch<V>>,
    scale: &Arc<Scale>,
) -> V

The canonical value of a residue-dependent value: a branch that itself depends on the residue is read on its own class, a single branch is that value, and a dependence whose every branch is an integer polynomial in 1/dt on its class is that infinite integer.